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the study found a significant increase in birth weight in the second period &#40;758&#46;9<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>160&#46;7 vs 773&#46;8<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>158&#46;6<span class="elsevierStyleHsp" style=""></span>g&#59; <span class="elsevierStyleItalic">P</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;001&#41;&#44; as well as in the weight of survivors at 28 days &#40;991<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>209 vs 1029<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>211<span class="elsevierStyleHsp" style=""></span>g&#59; <span class="elsevierStyleItalic">P</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;001&#41; and 36 weeks of postmenstrual age &#40;PMA&#41; &#40;1890<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>365 vs 1967<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>377<span class="elsevierStyleHsp" style=""></span>g&#59; <span class="elsevierStyleItalic">P</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;001&#41;&#46; These data suggest that there may have been improvement in antenatal care as well as in neonatal care&#44; in general and in the nutritional practices following admission to neonatal units&#46; However&#44; the postnatal growth pattern of extremely preterm infants &#40;EPIs&#41; has not been analysed again in this more recent period of time&#46; The objectives of our study were to&#58; &#40;1&#41; describe postnatal weight gain outcomes relative to PMA in a contemporary cohort of Spanish newborns delivered at 28 or fewer weeks&#8217; gestation during their initial hospital stay&#44; and &#40;2&#41; to assess the changes in length and HC between birth and hospital discharge in survivors&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Patients and methods</span><p id="par0015" class="elsevierStylePara elsevierViewall">We studied a cohort of 4522 newborns&#44; all Caucasian&#44; product of singleton pregnancies and without malformations delivered at 28 or fewer weeks&#8217; gestation between 2002 and 2011 in the participating hospitals of the Spanish SEN1500 database&#46;<a class="elsevierStyleCrossRef" href="#bib0270"><span class="elsevierStyleSup">14</span></a> Their weight&#44; length and HC have already been analysed and were used to develop new intrauterine growth charts for Spanish EPIs&#46;<a class="elsevierStyleCrossRef" href="#bib0275"><span class="elsevierStyleSup">15</span></a> Our study analysed postnatal weight gain relative to PMA based on weight measurements taken at 4 significant time points&#58; birth&#44; 28 days of chronological day&#44; 36 weeks&#8217; PMA and discharge&#46; To assess growth&#44; we calculated the <span class="elsevierStyleItalic">z</span>-scores using as reference the mean values in children of both sexes for each GA in the tables of Olsen et al&#46;&#44;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">3</span></a> which are the tables that best approximate the Spanish population values between 23 and 28 weeks&#8217; GA and have values up to 41 weeks&#46; We calculated the <span class="elsevierStyleItalic">z</span>-score as&#58; &#40;patient weight&#44; length or HC<span class="elsevierStyleHsp" style=""></span>&#8722;<span class="elsevierStyleHsp" style=""></span>mean weight&#44; length or HC in reference curve for the same GA&#41;&#47;standard deviation of the reference for the same GA&#46; We examined weight gain in three periods&#58; from birth to 28 days&#44; from 28 days to 36 weeks&#8217; PMA and from 36 weeks&#8217; PMA to discharge from hospital&#46; To calculate the weight gain velocity &#40;WGV&#44; in g&#47;kg&#47;day&#41; we used the exponential method&#44; which has proven more accurate in estimating actual WGV than 2-point methods and linear regression models normalised for either birth weight or average weight&#44;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">16</span></a> and&#44; unlike them&#44; is not affected by low birth weight or hospital length of stay&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">17</span></a> Using this model&#44; the WGV between two time points is estimated based on the following equation&#58;<elsevierMultimedia ident="eq0005"></elsevierMultimedia></p><p id="par0020" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Data analysis</span>&#46; We have expressed quantitative variables as mean and standard deviation&#44; and calculated their differences between GA groups by means of analysis of variance &#40;ANOVA&#41;&#46; When assessed changes in weight over time with mixed-effects models for longitudinal data&#44;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">18</span></a> and we used the R programming language for statistical calculations and to generate graphs&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">19</span></a> For this part of the study&#44; due to the lesser number of observations in patients born at less than 24 weeks&#8217; gestation&#44; we grouped the most immature patients &#40;born at 22&#8211;24 weeks&#41; in a &#8220;24 or fewer weeks&#8221; category&#46; We fitted separate models for the following categories&#58; &#8804;24 weeks &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>629&#41;&#59; 25 weeks &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>674&#41;&#59; 26 weeks &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>958&#41;&#59; 27 weeks &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>1046&#41;&#59; and 28 weeks &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>1213&#41;&#46; All models were developed according to the following formula&#58;<elsevierMultimedia ident="eq0010"></elsevierMultimedia>where <span class="elsevierStyleItalic">Weight</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">i</span>&#44;<span class="elsevierStyleItalic">j</span></span> refers to the weight of the <span class="elsevierStyleItalic">i</span>th child in the <span class="elsevierStyleItalic">j</span>th assessment&#44; <span class="elsevierStyleItalic">week</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">i</span>&#44;<span class="elsevierStyleItalic">j</span></span> is the postmenstrual week&#44; the <span class="elsevierStyleItalic">&#945;</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">k</span></span> term represents the fixed effects of the model&#44; the random variable <span class="elsevierStyleItalic">b</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">i</span></span> stands for the random effect of the <span class="elsevierStyleItalic">i</span>th child&#44; <span class="elsevierStyleItalic">e</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">i</span>&#44;<span class="elsevierStyleItalic">j</span></span> for the internal variability and finally <span class="elsevierStyleItalic">node</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">k</span></span> for the nodes selected to build the spline&#46; Here&#44; <span class="elsevierStyleItalic">z</span><span class="elsevierStyleInf">&#43;</span> stands for the positive part of <span class="elsevierStyleItalic">z</span>&#46; The model was estimated under the assumptions that the random effects <span class="elsevierStyleItalic">b</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">i</span></span> were independent and followed a N&#40;0&#44;&#963;b2&#41; distribution&#44; and the random variables <span class="elsevierStyleItalic">e</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">i</span>&#44;<span class="elsevierStyleItalic">j</span></span> were independent from each other&#44; independent from <span class="elsevierStyleItalic">b</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">i</span></span> and followed an N&#40;0&#44;&#963;e2&#41; distribution&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Results</span><p id="par0025" class="elsevierStylePara elsevierViewall">Of the 4522 patients in the initial cohort&#44; 2 were excluded due to invalid postnatal data&#46; <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a> shows the total number of patients included in the study and the total number of weight measurements used in the calculations and to develop the graphs&#46; Of the 4520 newborns&#44; 2490 &#40;55&#46;1&#37;&#41; were male and 2030 &#40;44&#46;9&#37;&#41; female&#46; <a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a> shows the distribution of birth weights by sex and GA&#46; Girls weighed 5&#46;6&#37; less than boys on average &#40;<span class="elsevierStyleItalic">P</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;001&#41;&#46; However&#44; for the longitudinal analysis of growth we used the combined values for both sexes for each GA &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41;&#46; This figure shows a similar pattern of postnatal growth for every GA&#44; with a slow initial phase from birth to 28 days of life &#40;WGV<span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>8&#46;0<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;day&#41;&#44; a subsequent quickening between 28 days and 36 weeks of PMA &#40;WGV<span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>14&#46;3<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;day&#41; and once again a slowing up until to hospital discharge &#40;WGV<span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>11&#46;7<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;day&#41;&#46; In the first 28 days&#44; the WGV was significantly slower in the most immature newborns&#44; but these differences disappeared with chronological age &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46; <a class="elsevierStyleCrossRef" href="#fig0015">Fig&#46; 3</a> shows the mean weight gain curves for each GA group from birth to discharge from hospital&#44; compared to the adapted Olsen et al&#46; tables&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">3</span></a> We can discern a initial curve that slows down with a progressive &#8220;loss&#8221; of weight percentile&#44; which decreases from the 50th percentile at birth to the 3rd to 10th percentile in the first weeks of life&#46; This deceleration lasted longer in the most immature newborns&#44; but from week 30 to 32 of PMA&#44; the curves tended to gather around the 3rd to 10th percentiles until hospital discharge&#46; <a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a> shows the mean weight for each GA group along with the corresponding <span class="elsevierStyleItalic">z</span>-score at each of the analysed time points&#46; At birth&#44; our patients had <span class="elsevierStyleItalic">z</span>-scores near zero&#44; reflecting values similar to those in the reference curves&#46; Later on&#44; at 28 days post birth&#44; the <span class="elsevierStyleItalic">z</span>-scores decreased for all GA groups by approximately 1&#46;25 points&#44; which reflects a postnatal growth retardation that became more pronounced by 36 weeks of PMA &#40;<span class="elsevierStyleItalic">z</span> of approximately &#8722;1&#46;6&#41; and was sustained until discharge &#40;<span class="elsevierStyleItalic">z</span> of approximately &#8722;1&#46;7&#41;&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><elsevierMultimedia ident="fig0005"></elsevierMultimedia><elsevierMultimedia ident="fig0010"></elsevierMultimedia><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><elsevierMultimedia ident="fig0015"></elsevierMultimedia><elsevierMultimedia ident="tbl0015"></elsevierMultimedia><p id="par0030" class="elsevierStylePara elsevierViewall">When it came to length and HC&#44; we could not graph growth curves due to the lack of intermediate measurements&#46; <a class="elsevierStyleCrossRefs" href="#tbl0020">Tables 4 and 5</a> show the length and HC values at birth and at discharge with their corresponding <span class="elsevierStyleItalic">z</span>-scores&#46; For both variables&#44; the <span class="elsevierStyleItalic">z</span>-scores of our patients at birth were near zero&#44; that is&#44; they were at the 50th percentile in the reference tables&#46; However&#44; at the time of discharge the <span class="elsevierStyleItalic">z</span>-scores for HC had decreased by approximately 0&#46;7&#44; roughly approximating the 25th percentile&#44; and by about 2 for length &#40;&#8804;3rd percentile&#41;&#46;</p><elsevierMultimedia ident="tbl0020"></elsevierMultimedia><elsevierMultimedia ident="tbl0025"></elsevierMultimedia></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Discussion</span><p id="par0035" class="elsevierStylePara elsevierViewall">Our study&#44; which analysed a large contemporary cohort of EPIs representative of every geographical area in Spain&#44; showed that despite recent advances in perinatal care and the theoretical improvements introduced in the nutrition of very preterm infants&#44; growth in the early weeks of extrauterine life is slower than intrauterine growth&#46; Although the chosen time points for weight measurement were arbitrary&#44; the WGV followed a sinusoidal pattern&#44; which could result partly from clinical and partly from methodological aspects&#46; We observed a slow weight gain in the first weeks of life&#44; which could correspond to an increased metabolic rate during the period of adaptation to extrauterine life and the most critical stages of acute illness in these patients&#44; as well as the real or perceived difficulties in providing adequate nutritional support&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">20</span></a> Furthermore&#44; during this phase&#44; the most immature newborns&#44; who were probably also more critically ill&#44; grew considerably slower than newborns with greater GAs&#46; Later on&#44; we observed an acceleration phase&#44; with a WGV from 28 days post birth to 36 weeks of PMA that approximated foetal growth for equivalent GAs&#46; During this phase&#44; the differences between GA groups disappeared&#46; A possible explanation is that the data collected during this period corresponds to survivors&#44; and therefore to less critically ill patients&#44; as those who died did so at a median of 5 days &#40;interquartile range&#44; 2&#8211;14&#46;25&#41;&#46; However&#44; starting from 36 weeks&#44; the data correspond to patients that remained hospitalised&#44; in whom complications and underlying disease were probably more frequent&#44; which could account for the renewed slowing of weight gain found in our study&#46; At any rate&#44; our data includes all the patients that were available at each time&#44; and therefore their longitudinal growth pattern may reflect multiple circumstances in addition to nutritional support&#44; such as genetic factors&#44; environmental factors&#44; disease severity&#44; complications&#44; etc&#46; In fact&#44; it is estimated that 50&#37; of the variance in early postnatal growth is due to non-nutritional factors&#46;<a class="elsevierStyleCrossRefs" href="#bib0305"><span class="elsevierStyleSup">21&#44;22</span></a> A recent study showed that healthy preterm infants adjust their extrauterine growth trajectories to &#8722;0&#46;8 <span class="elsevierStyleItalic">z</span>-scores below their intrauterine percentile after their initial physiologic adaptation&#44; which could be considered a natural transition from intrauterine to extrauterine growth trajectories&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">23</span></a></p><p id="par0040" class="elsevierStylePara elsevierViewall">An &#8220;adequate&#8221; weight curve is usually considered indicative of a healthy infant&#46; However&#44; in the case of preterm infants&#44; we do not know with certainty which are the best reference standards&#44; nor which growth pattern leads to the best possible outcomes in the long term&#46; Preterm birth itself may be the final outcome of a complicated gestation&#44; which means that preterm newborns could have weights below those of foetuses of the same GA that remain in utero&#46;<a class="elsevierStyleCrossRef" href="#bib0320"><span class="elsevierStyleSup">24</span></a> Furthermore&#44; the extrauterine environment constitutes a drastic change for newborns that requires the activation of multiple adaptive mechanisms&#44; with all the changes in metabolic rate and energy expenditure that this entails&#44; and is compounded by the illness associated with prematurity&#44; which may complicate the initiation and maintenance of enteral and parenteral nutrition&#46;<a class="elsevierStyleCrossRef" href="#bib0325"><span class="elsevierStyleSup">25</span></a> On the other hand&#44; we ought to note that weight gain itself is not necessarily indicative of adequate nutrition&#44; as it does not guarantee adequate changes in body composition&#46; Everyday clinical practice and most studies do not differentiate between gains in lean mass and fat mass&#46; Modern air-displacement plethysmography systems facilitate the assessment of body composition and weight gain quality&#44;<a class="elsevierStyleCrossRefs" href="#bib0330"><span class="elsevierStyleSup">26&#44;27</span></a> which combined with anthropometric measurements and the clinical follow-up of patients could help increase our knowledge or estimation of optimal growth patterns&#46;<a class="elsevierStyleCrossRef" href="#bib0340"><span class="elsevierStyleSup">28</span></a> Accelerated growth could lead to the development of metabolic and cardiovascular complications&#44; while excessively slow growth has been associated with poorer neurodevelopmental outcomes&#46;<a class="elsevierStyleCrossRefs" href="#bib0235"><span class="elsevierStyleSup">7&#8211;10&#44;29</span></a> In fact&#44; to date&#44; none of the growth patterns has proven superior to others as regards medium- to long-term health outcomes&#46; Some authors recommend against assigning patients target percentiles based on their birth weight&#44; and instead proposed that they be assigned based on weight at 2&#8211;3 weeks post birth&#44; that is&#44; once weight gain has steadied&#46;<a class="elsevierStyleCrossRef" href="#bib0350"><span class="elsevierStyleSup">30</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">The association between growth and motor and cognitive development in patients is still subject to debate&#46; It is generally accepted that EPIs are at high risk of both postnatal growth retardation and adverse neurodevelopmental outcomes&#46;<a class="elsevierStyleCrossRefs" href="#bib0355"><span class="elsevierStyleSup">31&#44;32</span></a> However&#44; the causal relationship between these two phenomena and their potential mechanisms remain largely unknown&#46; A recent study showed that a weight gain in the lowest quartile between 7 and 28 days of life is not associated with neurodevelopmental impairment&#44;<a class="elsevierStyleCrossRef" href="#bib0365"><span class="elsevierStyleSup">33</span></a> suggesting the possibility that underlying brain damage may itself be the cause of reduced growth in some cases&#46; Kan et al&#46; also found no association between intrauterine growth restriction and neurodevelopmental outcomes at age 8 years&#46;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">34</span></a> Furthermore&#44; this study found that weight at birth and subsequent ages had no significant impact on neurodevelopmental outcomes&#44; while smaller HCs at ages 2 and 8 years were associated with impairment&#46; The authors concluded that current nutritional practices do not have a negative impact on the neurodevelopmental outcomes of children born very preterm&#44; even if their body growth during childhood is smaller compared to their full-term peers&#46; Lastly&#44; and along the same lines&#44; studies on nutrient supplementation after hospital discharge have also failed to find solid evidence of its benefits on HC growth or neurodevelopmental outcomes&#46;<a class="elsevierStyleCrossRef" href="#bib0375"><span class="elsevierStyleSup">35</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">An interesting finding in our study was that postnatal growth restriction was more marked in length compared to weight or HC&#46; This pattern of changes in anthropometric parameters has also been observed by other authors&#44;<a class="elsevierStyleCrossRefs" href="#bib0380"><span class="elsevierStyleSup">36&#44;37</span></a> who have demonstrated that it persists past discharge from hospital&#46; This pattern differs from the classical pattern associated with malnutrition&#44; in which weight is more affected than height and HC&#46; This finding is important&#44; as linear growth reflects the increase in lean mass and protein accretion&#44; which in turn are indicative of the growth of organs&#44; including the brain&#44; whose growth is associated with the increase of neural processing speed in preterm infants&#46;<a class="elsevierStyleCrossRef" href="#bib0390"><span class="elsevierStyleSup">38</span></a> Although the optimal linear growth pattern is also not fully known&#44; recent evidence has shown that reduced linear growth is associated with poorer long-term cognitive outcomes&#46;<a class="elsevierStyleCrossRefs" href="#bib0385"><span class="elsevierStyleSup">37&#44;39&#44;40</span></a></p><p id="par0055" class="elsevierStylePara elsevierViewall">One of the limitations of our study is that fluid therapy and nutritional interventions were not documented systematically&#44; so we were not able to definitely establish their association with postnatal growth&#46; However&#44; one of its strengths is the large number of patients and of participating units&#44; which makes our findings representative of the anthropometric variations at birth in a large contemporary cohort of extremely preterm infants that&#44; in turn&#44; could be a reflection of current clinical practices&#46; Another limitation is that we do not have long-term follow-up data for this cohort of patients&#44; so we could not determine whether there is an association&#44; at least from an epidemiological standpoint&#44; between growth pattern and neurodevelopmental outcomes&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">In conclusion&#44; EPIs exhibit a slow WGV in the first weeks post birth that may be partly explained as a phenomenon of adaptation to extrauterine life&#46; It may be preferable to set the growth targets for these patients during their hospital stay not at the birth percentiles&#44; but at the percentiles that the patient is at when this initial adaptation is complete&#46; In any case&#44; the assessment of growth based solely on weight gain does not seem appropriate&#46; Close monitoring of linear and HC growth is essential for nutritional assessment and probably more important than weight gain in the detection of patients at risk of poor growth or neurodevelopmental outcomes after discharge from hospital&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Conflicts of interest</span><p id="par0065" class="elsevierStylePara elsevierViewall">The authors have no conflicts of interest to declare</p></span></span>"
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        "titulo" => "Abstract"
        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Introduction</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Postnatal growth restriction is considered a universal problem in extremely premature infants &#40;EPI&#41;&#44; and causes great concern due to the possible relationship between nutrition&#44; sub-optimal postnatal growth&#44; and neurodevelopment delay&#46;</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Objectives</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">To describe the weight gain in EPI and to determine the changes in the length and head circumference &#40;HC&#41; at hospital discharge in survivors&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Patients and methods</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">The study included 4520 Caucasian EPI from single pregnancies and without severe malformations&#44; born in the centres participating in the Spanish SEN1500 network &#40;2002&#8211;2011&#41;&#46; The weight was recorded at birth&#44; 28 days&#44; 36 weeks post-menstrual age &#40;PMA&#41;&#44; and at discharge&#46; The length and HC were measured at birth and at discharge&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Results</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">The rate of weight gain &#40;exponential method&#41; was 8&#46;0<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;day &#40;birth to 28 days&#41;&#59; 14&#46;3<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;day &#40;28 days to 36 weeks&#41;&#59; and 11&#46;7<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;day &#40;36 weeks to discharge&#41;&#46; At discharge&#44; postnatal growth restriction was greater for length &#40;<span class="elsevierStyleItalic">z</span>-score between &#8722;1&#46;78 and &#8722;2&#46;42&#44; depending on GA&#41;&#44; followed by weight &#40;&#8722;1&#46;67 to &#8722;1&#46;79&#41;&#44; and HC &#40;&#8722;0&#46;69 to &#8722;0&#46;81&#41;&#46;</p></span> <span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Conclusions</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Weight gain in the first weeks after birth is slow in EPI&#44; and they exhibit an almost universal postnatal growth restriction that involves mainly length and weight&#46; In addition to weight&#44; a close control of longitudinal growth and HC are essential for nutritional assessment and detection of patients at risk for poor growth and neurodevelopment after hospital discharge&#46;</p></span>"
        "secciones" => array:5 [
          0 => array:2 [
            "identificador" => "abst0005"
            "titulo" => "Introduction"
          ]
          1 => array:2 [
            "identificador" => "abst0010"
            "titulo" => "Objectives"
          ]
          2 => array:2 [
            "identificador" => "abst0015"
            "titulo" => "Patients and methods"
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          3 => array:2 [
            "identificador" => "abst0020"
            "titulo" => "Results"
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          4 => array:2 [
            "identificador" => "abst0025"
            "titulo" => "Conclusions"
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      "es" => array:3 [
        "titulo" => "Resumen"
        "resumen" => "<span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Introducci&#243;n</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">La restricci&#243;n posnatal del crecimiento es considerada un problema universal en reci&#233;n nacidos extremadamente prematuros &#40;RNEP&#41;&#44; generando gran preocupaci&#243;n debido a la posible relaci&#243;n entre nutrici&#243;n&#44; crecimiento posnatal sub&#243;ptimo y alteraciones del neurodesarrollo&#46;</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Objetivos</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Describir la evoluci&#243;n de la ganancia posnatal de peso en RNEP y conocer los cambios en la longitud y el per&#237;metro craneal &#40;PC&#41; al alta hospitalaria en los supervivientes&#46;</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Pacientes y m&#233;todos</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Se estudi&#243; a 4&#46;520 RNEP de raza blanca&#44; de gestaciones &#250;nicas y sin malformaciones&#44; nacidos en los centros participantes en la red espa&#241;ola SEN1500 &#40;2002-2011&#41;&#46; El peso se registr&#243; al nacimiento&#44; 28 d&#237;as&#44; 36 semanas de edad posmenstrual y al alta hospitalaria&#46; La longitud y el PC se estudiaron al nacimiento y al alta&#46;</p></span> <span id="abst0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Resultados</span><p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">La velocidad de ganancia ponderal fue de 8&#44;0<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;d&#237;a &#40;nacimiento-28 d&#237;as&#41;&#59; 14&#44;3<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;d&#237;a &#40;28 d&#237;as-36 semanas&#41;&#44; y 11&#44;7<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;d&#237;a &#40;36 semanas-alta hospitalaria&#41;&#46; Al alta&#44; la restricci&#243;n posnatal del crecimiento fue mayor para la longitud &#40;z-score entre &#8722;1&#44;78 y &#8722;2&#44;42&#44; en funci&#243;n de la edad gestacional&#41;&#44; seguida del peso &#40;&#8722;1&#44;67 a &#8722;1&#44;79&#41; y&#44; finalmente&#44; el PC &#40;&#8722;0&#44;69 a &#8722;0&#44;81&#41;&#46;</p></span> <span id="abst0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Conclusiones</span><p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Los RNEP presentan una velocidad de ganancia ponderal lenta en las primeras semanas tras el nacimiento y una restricci&#243;n posnatal del crecimiento que afecta en mayor grado a la longitud y al peso&#46; Adem&#225;s del peso&#44; un control estrecho del crecimiento longitudinal y del PC es fundamental para la valoraci&#243;n nutricional y la detecci&#243;n de pacientes de riesgo respecto al crecimiento y el neurodesarrollo tras el alta hospitalaria&#46;</p></span>"
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            "titulo" => "Introducci&#243;n"
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            "titulo" => "Objetivos"
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            "titulo" => "Pacientes y m&#233;todos"
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            "identificador" => "abst0045"
            "titulo" => "Resultados"
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            "titulo" => "Conclusiones"
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      0 => array:3 [
        "etiqueta" => "&#9674;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0040"><a class="elsevierStyleCrossRef" href="#sec0030">Appendix A</a> details the names of the hospitals and researchers of the SEN1500 neonatal network&#46;</p>"
        "identificador" => "fn1"
      ]
      1 => array:2 [
        "etiqueta" => "&#9734;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0030">Please cite this article as&#58; Garc&#237;a-Mu&#241;oz Rodrigo F&#44; Figueras Aloy J&#44; Saavedra Santana P&#44; Garc&#237;a-Alix A&#46; Crecimiento posnatal hasta el alta hospitalaria en reci&#233;n nacidos extremadamente prematuros espa&#241;oles&#46; An Pediatr &#40;Barc&#41;&#46; 2017&#59;87&#58;301&#8211;310&#46;</p>"
      ]
      2 => array:2 [
        "etiqueta" => "&#9734;&#9734;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0035">Previous presentation&#58; this study was presented in part at the XXV Congreso de Neonatolog&#237;a y Medicina Perinatal of the Sociedad Espa&#241;ola de Neonatolog&#237;a&#44; May 2015&#44; Seville&#44; Spain&#46;</p>"
      ]
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          0 => array:4 [
            "apendice" => "<p id="par0075" class="elsevierStylePara elsevierViewall">Complejo Hospitalario de Albacete &#40;Andr&#233;s Mart&#237;nez Guti&#233;rrez&#41;&#59; Hospital Universitario de Basurto &#40;Alberto P&#233;rez Legorburu&#41;&#59; Hospital del Bierzo &#40;Mar&#237;a Teresa Prada&#41;&#59; Hospital de Cabue&#241;es &#40;Rafael Garc&#237;a Mozo&#41;&#59; Hospital Carlos Haya &#40;Tom&#225;s S&#225;nchez Tamayo&#41;&#59; Hospital General de Castell&#243;n &#40;Ram&#243;n Aguilera Olmos&#41;&#59; Hospital Central de Asturias &#40;Bel&#233;n Fern&#225;ndez Colomer&#41;&#59; Hospital Cl&#237;nic de Barcelona &#40;Josep Figuera Aloy&#41;&#59; Hospital Cl&#237;nico San Carlos &#40;Araceli Corredera S&#225;nchez&#41;&#59; Hospital de Cruces &#40;Amaya Rodr&#237;guez Serna&#41;&#59; Hospital Universitario de Donostia &#40;M&#46; &#193;ngel Cortajarena Altuna&#41;&#59; Hospital de Elche &#40;Josep Mut Buigues&#41;&#59; Hospital General de Catalu&#241;a &#40;Laura Castells Vilella&#41;&#59; Hospital General de Granollers &#40;Israel Anquela Sanz&#41;&#59; Hospital Germans Trias i Pujol &#40;W&#46; Coroleu&#41;&#59; Hospital de Getafe &#40;Luc&#237;a Cabanillas Vilaplana&#41;&#59; Hospital Infanta Margarita &#40;Jos&#233; Mar&#237;a Barc&#237;a Ruiz&#41;&#59; Hospital de Jerez &#40;Dolores Esquivel Mora&#41;&#59; Hospital Juan Ram&#243;n Jim&#233;nez &#40;Jos&#233; &#193;ngel Morilla S&#225;nchez&#41;&#59; Hospital Juan XXIII &#40;Mar Alb&#250;jar&#41;&#59; Hospital de Le&#243;n &#40;Emilio &#193;lvaro Iglesias&#41;&#59; Hospital Miguel Servet &#40;Segundo Rite Gracia&#41;&#59; Corporaci&#243; Parc Taul&#237; &#40;Juan Badia&#41;&#59; Hospital San Juan de D&#233;u &#40;Mart&#237;n Iriondo Sanz&#41;&#59; Hospital San Pedro de Logro&#241;o &#40;In&#233;s Esteban D&#237;ez&#41;&#59; Hospital San Pedro de Alc&#225;ntara &#40;M&#170; Jes&#250;s L&#243;pez Cuesta&#41;&#59; Hospital de la Santa Creu i Sant Pau &#40;Gemma Ginovart Galiana&#41;&#59; Hospital Severo Ochoa &#40;Mar&#237;a Jos&#233; Santos Mu&#241;oz&#41;&#59; Hospital Txagorritxu &#40;Mar&#237;a Mercedes Mart&#237;nez Ayucar&#41;&#59; Hospital Universitario Arnau de Vilanova &#40;Eduard Sol&#233; Mir&#41;&#59; Hospital Valme &#40;Antonio Guti&#233;rrez Benjumea&#41;&#59; Hospital Virgen de la Concha &#40;V&#237;ctor Marug&#225;n Isabel&#41;&#59; Hospital UniversitarioVirgen de la Macarena &#40;Mercedes Granero Asencio&#41;&#59; Hospital Virgen de la Salud &#40;Alicia de Ureta Huertas&#41;&#59; Hospital UniversitarioVirgen de las Nieves &#40;M&#46; Fernanda Moreno Gald&#243;&#41;&#59; Hospital Xeral de Vigo &#40;Mar&#237;a Su&#225;rez Albo&#41;&#59; Hospital Universitario de Valencia &#40;Javier Esta&#241; Capell&#41;&#59; Hospital Universitario de Zaragoza &#40;Purificaci&#243;n Ventura Faci&#41;&#59; Hospital Universitario de Santiago &#40;M&#46; Luz Couce Pico&#41;&#59; Hospital General de Burgos &#40;Cristina de Frutos Mart&#237;nez&#41;&#59; Hospital General Universitario de Alicante &#40;Miriam Salvador Iglesias&#41;&#59; Hospital Universitario de Fuenlabrada &#40;Laura Domingo Comeche&#41;&#59; Hospital Universitario Gregorio Mara&#241;&#243;n &#40;Amparo Rodr&#237;guez Herreras&#41;&#59; Hospital Universitario La Paz &#40;M&#46; Dolores Elorza&#41;&#59; Hospital Materno Infantil de Canarias &#40;Lourdes Urqu&#237;a Mart&#237;&#41;&#59; Hospital Universitario de Canarias &#40;Pedro A&#46; Fuster Jorge&#41;&#59; Hospital Universitario de San Cecilio &#40;Eduardo Narbona&#41;&#59; Hospital Universitari i Polit&#232;cnic La Fe &#40;Isabel Izquierdo Maci&#225;n&#41;&#59; Hospital Universitario Reina Sof&#237;a &#40;Juana Mar&#237;a Guzm&#225;n Caba&#241;as&#41;&#59; Hospital Universitario R&#237;o Hortera &#40;M&#46; Mar Montejo Vicente&#41;&#59; Hospital Universitario de Salamanca &#40;Pilar Garc&#237;a Gonz&#225;lez&#41;&#59; Hospital Universitario Virgen del Roc&#237;o &#40;Carmen Mac&#237;as D&#237;az&#41;&#59; Hospital Universitario Dexeus &#40;Roser Porta&#41;&#59; Scias-Hospital Barcelona &#40;Silvia Mart&#237;nez-Nadal&#41;&#46; Hospital Josep Trueta &#40;Alberto Trujillo&#41;&#59; Complejo Hospitalario Universitario de Pontevedra &#40;Javier Vilas Gonz&#225;lez&#41;&#59; Hospital Universitario de Ciudad Real &#40;Miguel &#193;ngel Cabezas&#41;&#59; Hospital Puerta del Mar &#40;Antonio Segado Arenas&#41;&#59; Hospital Doce de Octubre &#40;Carmen R&#46; Pall&#225;s Alonso&#41;&#46;</p>"
            "etiqueta" => "Appendix A"
            "titulo" => "Hospitals and researchers of the SEN1500 neonatal network"
            "identificador" => "sec0030"
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          "en" => "<p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">Birth weight distribution by GA in 2490 boys and 2030 girls born at 28 or fewer weeks&#8217; gestation&#46; SEN1500 &#40;2002&#8211;2011&#41;&#46;</p>"
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          "en" => "<p id="spar0060" class="elsevierStyleSimplePara elsevierViewall">Weight gain curves by GA at birth and by PMA in extremely preterm infants in Spain&#46; SEN1500 &#40;2002&#8211;2011&#41;&#46;</p>"
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          "en" => "<p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">Mean weight gain curves for each GA group from birth to hospital discharge&#44; against the standard curves adapted from Olsen et al&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">3</span></a> &#40;weighted mean weight of both sexes for each GA&#41;&#46;</p>"
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                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Weeks of gestation&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">22&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">23&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">24&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">25&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">26&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">27&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">28&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Total&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Patients&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">21&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">145&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">463&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">674&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">958&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">1046&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">1213&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">4520&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Measurements&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">44&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">336&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">1277&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">2104&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">3135&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">3571&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">4213&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">14<span class="elsevierStyleHsp" style=""></span>680&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
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          "en" => "<p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">Number of patients and number of weight measurements used in the analysis and development of longitudinal growth curves by completed weeks of gestation&#46;</p>"
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        "etiqueta" => "Table 2"
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                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Gestational age &#40;weeks&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">&#8804;24&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">25&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">26&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">27&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">28&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Total 22&#8211;28&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">P</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">From birth to 28 days of life</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>220&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>399&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>655&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>799&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1015&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>3088&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">7&#46;2 &#40;4&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">7&#46;2 &#40;5&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">7&#46;6 &#40;4&#46;5&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">7&#46;8 &#40;4&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">8&#46;9 &#40;4&#46;3&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">8&#46;0 &#40;4&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#60;&#46;001&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">From 28 days to 36 weeks of PMA</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>176&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>343&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>544&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>657&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>756&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2476&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">13&#46;9 &#40;3&#46;1&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">14&#46;0 &#40;3&#46;5&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">14&#46;6 &#40;3&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">14&#46;4 &#40;3&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">14&#46;4 &#40;4&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">14&#46;3 &#40;3&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#46;080&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">From 36 weeks of PMA to hospital discharge</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>177&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>326&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>492&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>587&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>668&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2250&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">12&#46;5 &#40;6&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">12&#46;0 &#40;5&#46;9&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">11&#46;5 &#40;6&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">11&#46;7 &#40;6&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">11&#46;5 &#40;7&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">11&#46;7 &#40;6&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#46;367&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab1604433.png"
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        "descripcion" => array:1 [
          "en" => "<p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">Weight gain velocity &#40;in g&#47;kg&#47;day&#41; by gestational age&#44; in 3 intervals&#46; Calculations were performed using the exponential method&#46;</p>"
        ]
      ]
      5 => array:8 [
        "identificador" => "tbl0015"
        "etiqueta" => "Table 3"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "detalles" => array:1 [
          0 => array:3 [
            "identificador" => "at3"
            "detalle" => "Table "
            "rol" => "short"
          ]
        ]
        "tabla" => array:3 [
          "leyenda" => "<p id="spar0090" class="elsevierStyleSimplePara elsevierViewall">All values are expressed as mean &#40;standard deviation&#41;&#46;</p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">GA &#40;weeks&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Birth weight &#40;g&#41;<br>&#40;<span class="elsevierStyleItalic">N</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>4520&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Birth weight <span class="elsevierStyleItalic">z</span>-score<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Weight at 28 days &#40;g&#41;<br>&#40;<span class="elsevierStyleItalic">N</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>3102&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Weight at 28 days<br><span class="elsevierStyleItalic">z</span>-score<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Weight at 36 weeks&#8217; PMA &#40;g&#41;<br>&#40;<span class="elsevierStyleItalic">N</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2554&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Weight at 36 weeks&#8217; PMA<br><span class="elsevierStyleItalic">z</span>-score<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">PMA at discharge in survivors &#40;weeks&#41;<br>&#40;<span class="elsevierStyleItalic">N</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2984&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Weight at discharge in survivors &#40;g&#41;<br>&#40;<span class="elsevierStyleItalic">N</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2982&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Weight at discharge<br><span class="elsevierStyleItalic">z</span>-score<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">22&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>21<br>526 &#40;67&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1<br>730&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1<br>2870&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1<br>38&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1<br>3300&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">23&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>145<br>612 &#40;91&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&#46;08 &#40;1&#46;18&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>25<br>831 &#40;144&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;0&#46;81 &#40;0&#46;85&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>21<br>1891 &#40;521&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;70 &#40;1&#46;03&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>19<br>42&#46;1 &#40;4&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>19<br>3172 &#40;816&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">24&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>463<br>679 &#40;98&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&#46;11 &#40;1&#46;05&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>194<br>854 &#40;140&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;21 &#40;0&#46;69&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>159<br>1863 &#40;140&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;76 &#40;0&#46;62&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>164<br>41&#46;2 &#40;4&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>164<br>2795 &#40;673&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;67 &#40;1&#46;34&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">25&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>674<br>769 &#40;125&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&#46;09 &#40;1&#46;06&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>401<br>969 &#40;194&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;23 &#40;0&#46;87&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">27&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;73 &#40;0&#46;95&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;0&#46;12 &#40;1&#46;13&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;29 &#40;0&#46;92&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;71 &#40;0&#46;92&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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            0 => array:3 [
              "identificador" => "tblfn0005"
              "etiqueta" => "a"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0005">The <span class="elsevierStyleItalic">z</span>-scores were calculated based on the average of the pooled values of both sexes in the tables of Olsen et al&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">3</span></a></p>"
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0085" class="elsevierStyleSimplePara elsevierViewall">Changes in weight from birth to hospital discharge in extremely preterm infants&#46;</p>"
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      6 => array:8 [
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          0 => array:3 [
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          "leyenda" => "<p id="spar0100" class="elsevierStyleSimplePara elsevierViewall">All values are expressed as mean &#40;standard deviation&#41;&#46;</p>"
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                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">GA at birth &#40;weeks&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Length at discharge<a class="elsevierStyleCrossRef" href="#tblfn0015"><span class="elsevierStyleSup">b</span></a> in survivors &#40;cm&#41;<br>&#40;<span class="elsevierStyleItalic">N</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2658&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;78 &#40;0&#46;98&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
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            0 => array:3 [
              "identificador" => "tblfn0010"
              "etiqueta" => "a"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0010">The <span class="elsevierStyleItalic">z</span>-scores were calculated based on the average of the pooled values of both sexes in the tables of Olsen et al&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">3</span></a></p>"
            ]
            1 => array:3 [
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              "etiqueta" => "b"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0015">The PMA at discharge for each GA is shown in <a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a>&#46;</p>"
            ]
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          "en" => "<p id="spar0095" class="elsevierStyleSimplePara elsevierViewall">Length at birth and at discharge in extremely premature infants&#46;</p>"
        ]
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          "leyenda" => "<p id="spar0110" class="elsevierStyleSimplePara elsevierViewall">All values are expressed as mean &#40;standard deviation&#41;&#46;</p>"
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                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">GA at birth &#40;weeks&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">z</span>-score<a class="elsevierStyleCrossRef" href="#tblfn0020"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">22&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">23&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>105<br>21&#46;3 &#40;1&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&#46;19 &#40;1&#46;60&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;0&#46;02 &#40;1&#46;20&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>336<br>33&#46;5 &#40;2&#46;3&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;0&#46;69 &#40;1&#46;55&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&#46;10 &#40;1&#46;19&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;0&#46;71 &#40;1&#46;28&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">27&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;0&#46;05 &#40;1&#46;22&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>702<br>33&#46;1 &#40;2&#46;1&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;0&#46;73 &#40;1&#46;33&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>910<br>32&#46;8 &#40;1&#46;9&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;0&#46;81 &#40;1&#46;12&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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            0 => array:3 [
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              "etiqueta" => "a"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0020">The <span class="elsevierStyleItalic">z</span>-scores were calculated based on the average of the pooled values of both sexes in the tables of Olsen et al&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">3</span></a></p>"
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              "nota" => "<p class="elsevierStyleNotepara" id="npar0025">The PMA at discharge for each GA is shown in <a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a>&#46;</p>"
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        "descripcion" => array:1 [
          "en" => "<p id="spar0105" class="elsevierStyleSimplePara elsevierViewall">Head circumference at birth and at discharge in extremely preterm infants&#46;</p>"
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        0 => array:2 [
          "identificador" => "bibs0015"
          "bibliografiaReferencia" => array:40 [
            0 => array:3 [
              "identificador" => "bib0205"
              "etiqueta" => "1"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Extrauterine growth restriction remains a serious problem in prematurely born neonates"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "R&#46;H&#46; Clark"
                            1 => "P&#46; Thomas"
                            2 => "J&#46; Peabody"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
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                        "fecha" => "2003"
                        "volumen" => "111"
                        "paginaInicial" => "986"
                        "paginaFinal" => "990"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/12728076"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            1 => array:3 [
              "identificador" => "bib0210"
              "etiqueta" => "2"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
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                      "titulo" => "Postnatal growth retardation&#58; a universal problem in preterm infants"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "R&#46;J&#46; Cooke"
                            1 => "S&#46;B&#46; Ainsworth"
                            2 => "A&#46;C&#46; Fenton"
                          ]
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                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1136/adc.2001.004044"
                      "Revista" => array:6 [
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                        "volumen" => "89"
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                  ]
                ]
              ]
            ]
            2 => array:3 [
              "identificador" => "bib0215"
              "etiqueta" => "3"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "New intrauterine growth curves based on United States data"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
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                            0 => "I&#46;E&#46; Olsen"
                            1 => "S&#46;A&#46; Groveman"
                            2 => "M&#46;L&#46; Lawson"
                            3 => "R&#46;H&#46; Clark"
                            4 => "B&#46;S&#46; Zemel"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1542/peds.2009-0913"
                      "Revista" => array:6 [
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                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            3 => array:3 [
              "identificador" => "bib0220"
              "etiqueta" => "4"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:1 [
                      "titulo" => "American Academy of Pediatrics Committee on Nutrition&#58; nutritional needs of low-birth-weight infants"
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                  ]
                  "host" => array:1 [
                    0 => array:1 [
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                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            4 => array:3 [
              "identificador" => "bib0225"
              "etiqueta" => "5"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
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                      "autores" => array:1 [
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                          "etal" => false
                          "autores" => array:6 [
                            0 => "A&#46; Dinerstein"
                            1 => "R&#46;M&#46; Nieto"
                            2 => "C&#46;L&#46; Solana"
                            3 => "G&#46;P&#46; Perez"
                            4 => "L&#46;E&#46; Otheguy"
                            5 => "A&#46;M&#46; Larguia"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1038/sj.jp.7211539"
                      "Revista" => array:6 [
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                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/16801958"
                            "web" => "Medline"
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              "identificador" => "bib0230"
              "etiqueta" => "6"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Nutritional practices and growth velocity in the first month of life in extremely premature infants"
                      "autores" => array:1 [
                        0 => array:3 [
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                          "etal" => true
                          "autores" => array:6 [
                            0 => "C&#46;R&#46; Martin"
                            1 => "Y&#46;F&#46; Brown"
                            2 => "R&#46;A&#46; Ehrenkranz"
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                            4 => "E&#46;N&#46; Allred"
                            5 => "M&#46;B&#46; Belfort"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1542/peds.2008-3258"
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              ]
            ]
            6 => array:3 [
              "identificador" => "bib0235"
              "etiqueta" => "7"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
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                      "titulo" => "Randomised trial of early diet in preterm babies and later intelligence quotient"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
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                            0 => "A&#46; Lucas"
                            1 => "R&#46; Morley"
                            2 => "T&#46;J&#46; Cole"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "BMJ"
                        "fecha" => "1998"
                        "volumen" => "317"
                        "paginaInicial" => "1481"
                        "paginaFinal" => "1487"
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            ]
            7 => array:3 [
              "identificador" => "bib0240"
              "etiqueta" => "8"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Growth impairment in the very preterm and cognitive and motor performance at 7 years"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "R&#46;W&#46; Cooke"
                            1 => "L&#46; Foulder-Hughes"
                          ]
                        ]
                      ]
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                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Arch Dis Child"
                        "fecha" => "2003"
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                            "web" => "Medline"
                          ]
                        ]
                      ]
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                ]
              ]
            ]
            8 => array:3 [
              "identificador" => "bib0245"
              "etiqueta" => "9"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Growth in the neonatal intensive care unit influences neurodevelopmental and growth outcomes of extremely low birth weight infants"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:6 [
                            0 => "R&#46;A&#46; Ehrenkranz"
                            1 => "A&#46;M&#46; Dusick"
                            2 => "B&#46;R&#46; Vohr"
                            3 => "L&#46;L&#46; Wright"
                            4 => "L&#46;A&#46; Wrage"
                            5 => "W&#46;K&#46; Poole"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
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Original Article
Postnatal growth at hospital discharge in extremely premature newborns in Spain
Crecimiento posnatal hasta el alta hospitalaria en recién nacidos extremadamente prematuros españoles
Fermín García-Muñoz Rodrigoa,
Corresponding author
fgarciamu@gmail.com

Corresponding author.
, Josep Figueras Aloyb, Pedro Saavedra Santanac, Alfredo García-Alixd,
a Servicio de Neonatología, Complejo Hospitalario Universitario Insular Materno-Infantil, Las Palmas de Gran Canaria, Spain
b Servicio de Neonatología, Hospital Clínic i Provincial de Barcelona, Barcelona, Spain
c Departamento de Matemáticas, Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
d Servicio de Neonatología, Hospital Sant Joan de Déu, Barcelona, Spain
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this outcome is rarely observed in everyday clinical practice&#44; raising considerable concern among health professionals as regards the quality of the care and nutrition provided to these patients&#46;<a class="elsevierStyleCrossRefs" href="#bib0225"><span class="elsevierStyleSup">5&#44;6</span></a> This concern mostly involves the potential relationship between nutrition&#44; suboptimal postnatal growth and motor and&#47;or cognitive impairment in subsequent stages of life&#46;<a class="elsevierStyleCrossRefs" href="#bib0235"><span class="elsevierStyleSup">7&#8211;10</span></a> Embleton et al&#46; remarked on the inevitability of postnatal growth retardation in preterm infants due to the time it takes to achieve recommended dietary intakes&#44; as well as the difficulty in recovering from the additional nutritional deficits accrued during this time&#44; which are more pronounced in more immature and sicker infants&#46;<a class="elsevierStyleCrossRef" href="#bib0255"><span class="elsevierStyleSup">11</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">In Spain&#44; Krauel Vidal et al&#46;<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">12</span></a> studied the weight&#44; length and head circumference &#40;HC&#41; at birth and at discharge in a cohort of VLBW infants born at 32 or fewer weeks&#8217; gestation in any of 55 Spanish neonatal units between 2002 and 2003&#46; The main finding of this study was postnatal growth restriction&#44; evinced by a decreased z-score in the 3 parameters under study&#46; Growth restriction was most pronounced in length&#44; followed by weight&#44; which was below the 10th percentile at the time of discharge in 77&#37; of the infants&#46; Another study recently conducted in Spain that included 5470 infants delivered at 22&#8211;26 weeks&#8217; gestation<a class="elsevierStyleCrossRef" href="#bib0265"><span class="elsevierStyleSup">13</span></a> compared the outcomes of two different periods &#40;2002&#8211;2006 vs 2007&#8211;2011&#41;&#46; In addition to increases in survival and survival without major morbidity&#44; the study found a significant increase in birth weight in the second period &#40;758&#46;9<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>160&#46;7 vs 773&#46;8<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>158&#46;6<span class="elsevierStyleHsp" style=""></span>g&#59; <span class="elsevierStyleItalic">P</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;001&#41;&#44; as well as in the weight of survivors at 28 days &#40;991<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>209 vs 1029<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>211<span class="elsevierStyleHsp" style=""></span>g&#59; <span class="elsevierStyleItalic">P</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;001&#41; and 36 weeks of postmenstrual age &#40;PMA&#41; &#40;1890<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>365 vs 1967<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>377<span class="elsevierStyleHsp" style=""></span>g&#59; <span class="elsevierStyleItalic">P</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;001&#41;&#46; These data suggest that there may have been improvement in antenatal care as well as in neonatal care&#44; in general and in the nutritional practices following admission to neonatal units&#46; However&#44; the postnatal growth pattern of extremely preterm infants &#40;EPIs&#41; has not been analysed again in this more recent period of time&#46; The objectives of our study were to&#58; &#40;1&#41; describe postnatal weight gain outcomes relative to PMA in a contemporary cohort of Spanish newborns delivered at 28 or fewer weeks&#8217; gestation during their initial hospital stay&#44; and &#40;2&#41; to assess the changes in length and HC between birth and hospital discharge in survivors&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Patients and methods</span><p id="par0015" class="elsevierStylePara elsevierViewall">We studied a cohort of 4522 newborns&#44; all Caucasian&#44; product of singleton pregnancies and without malformations delivered at 28 or fewer weeks&#8217; gestation between 2002 and 2011 in the participating hospitals of the Spanish SEN1500 database&#46;<a class="elsevierStyleCrossRef" href="#bib0270"><span class="elsevierStyleSup">14</span></a> Their weight&#44; length and HC have already been analysed and were used to develop new intrauterine growth charts for Spanish EPIs&#46;<a class="elsevierStyleCrossRef" href="#bib0275"><span class="elsevierStyleSup">15</span></a> Our study analysed postnatal weight gain relative to PMA based on weight measurements taken at 4 significant time points&#58; birth&#44; 28 days of chronological day&#44; 36 weeks&#8217; PMA and discharge&#46; To assess growth&#44; we calculated the <span class="elsevierStyleItalic">z</span>-scores using as reference the mean values in children of both sexes for each GA in the tables of Olsen et al&#46;&#44;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">3</span></a> which are the tables that best approximate the Spanish population values between 23 and 28 weeks&#8217; GA and have values up to 41 weeks&#46; We calculated the <span class="elsevierStyleItalic">z</span>-score as&#58; &#40;patient weight&#44; length or HC<span class="elsevierStyleHsp" style=""></span>&#8722;<span class="elsevierStyleHsp" style=""></span>mean weight&#44; length or HC in reference curve for the same GA&#41;&#47;standard deviation of the reference for the same GA&#46; We examined weight gain in three periods&#58; from birth to 28 days&#44; from 28 days to 36 weeks&#8217; PMA and from 36 weeks&#8217; PMA to discharge from hospital&#46; To calculate the weight gain velocity &#40;WGV&#44; in g&#47;kg&#47;day&#41; we used the exponential method&#44; which has proven more accurate in estimating actual WGV than 2-point methods and linear regression models normalised for either birth weight or average weight&#44;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">16</span></a> and&#44; unlike them&#44; is not affected by low birth weight or hospital length of stay&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">17</span></a> Using this model&#44; the WGV between two time points is estimated based on the following equation&#58;<elsevierMultimedia ident="eq0005"></elsevierMultimedia></p><p id="par0020" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Data analysis</span>&#46; We have expressed quantitative variables as mean and standard deviation&#44; and calculated their differences between GA groups by means of analysis of variance &#40;ANOVA&#41;&#46; When assessed changes in weight over time with mixed-effects models for longitudinal data&#44;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">18</span></a> and we used the R programming language for statistical calculations and to generate graphs&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">19</span></a> For this part of the study&#44; due to the lesser number of observations in patients born at less than 24 weeks&#8217; gestation&#44; we grouped the most immature patients &#40;born at 22&#8211;24 weeks&#41; in a &#8220;24 or fewer weeks&#8221; category&#46; We fitted separate models for the following categories&#58; &#8804;24 weeks &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>629&#41;&#59; 25 weeks &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>674&#41;&#59; 26 weeks &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>958&#41;&#59; 27 weeks &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>1046&#41;&#59; and 28 weeks &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>1213&#41;&#46; All models were developed according to the following formula&#58;<elsevierMultimedia ident="eq0010"></elsevierMultimedia>where <span class="elsevierStyleItalic">Weight</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">i</span>&#44;<span class="elsevierStyleItalic">j</span></span> refers to the weight of the <span class="elsevierStyleItalic">i</span>th child in the <span class="elsevierStyleItalic">j</span>th assessment&#44; <span class="elsevierStyleItalic">week</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">i</span>&#44;<span class="elsevierStyleItalic">j</span></span> is the postmenstrual week&#44; the <span class="elsevierStyleItalic">&#945;</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">k</span></span> term represents the fixed effects of the model&#44; the random variable <span class="elsevierStyleItalic">b</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">i</span></span> stands for the random effect of the <span class="elsevierStyleItalic">i</span>th child&#44; <span class="elsevierStyleItalic">e</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">i</span>&#44;<span class="elsevierStyleItalic">j</span></span> for the internal variability and finally <span class="elsevierStyleItalic">node</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">k</span></span> for the nodes selected to build the spline&#46; Here&#44; <span class="elsevierStyleItalic">z</span><span class="elsevierStyleInf">&#43;</span> stands for the positive part of <span class="elsevierStyleItalic">z</span>&#46; The model was estimated under the assumptions that the random effects <span class="elsevierStyleItalic">b</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">i</span></span> were independent and followed a N&#40;0&#44;&#963;b2&#41; distribution&#44; and the random variables <span class="elsevierStyleItalic">e</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">i</span>&#44;<span class="elsevierStyleItalic">j</span></span> were independent from each other&#44; independent from <span class="elsevierStyleItalic">b</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">i</span></span> and followed an N&#40;0&#44;&#963;e2&#41; distribution&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Results</span><p id="par0025" class="elsevierStylePara elsevierViewall">Of the 4522 patients in the initial cohort&#44; 2 were excluded due to invalid postnatal data&#46; <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a> shows the total number of patients included in the study and the total number of weight measurements used in the calculations and to develop the graphs&#46; Of the 4520 newborns&#44; 2490 &#40;55&#46;1&#37;&#41; were male and 2030 &#40;44&#46;9&#37;&#41; female&#46; <a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a> shows the distribution of birth weights by sex and GA&#46; Girls weighed 5&#46;6&#37; less than boys on average &#40;<span class="elsevierStyleItalic">P</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;001&#41;&#46; However&#44; for the longitudinal analysis of growth we used the combined values for both sexes for each GA &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41;&#46; This figure shows a similar pattern of postnatal growth for every GA&#44; with a slow initial phase from birth to 28 days of life &#40;WGV<span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>8&#46;0<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;day&#41;&#44; a subsequent quickening between 28 days and 36 weeks of PMA &#40;WGV<span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>14&#46;3<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;day&#41; and once again a slowing up until to hospital discharge &#40;WGV<span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleMonospace">&#61;</span><span class="elsevierStyleHsp" style=""></span>11&#46;7<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;day&#41;&#46; In the first 28 days&#44; the WGV was significantly slower in the most immature newborns&#44; but these differences disappeared with chronological age &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46; <a class="elsevierStyleCrossRef" href="#fig0015">Fig&#46; 3</a> shows the mean weight gain curves for each GA group from birth to discharge from hospital&#44; compared to the adapted Olsen et al&#46; tables&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">3</span></a> We can discern a initial curve that slows down with a progressive &#8220;loss&#8221; of weight percentile&#44; which decreases from the 50th percentile at birth to the 3rd to 10th percentile in the first weeks of life&#46; This deceleration lasted longer in the most immature newborns&#44; but from week 30 to 32 of PMA&#44; the curves tended to gather around the 3rd to 10th percentiles until hospital discharge&#46; <a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a> shows the mean weight for each GA group along with the corresponding <span class="elsevierStyleItalic">z</span>-score at each of the analysed time points&#46; At birth&#44; our patients had <span class="elsevierStyleItalic">z</span>-scores near zero&#44; reflecting values similar to those in the reference curves&#46; Later on&#44; at 28 days post birth&#44; the <span class="elsevierStyleItalic">z</span>-scores decreased for all GA groups by approximately 1&#46;25 points&#44; which reflects a postnatal growth retardation that became more pronounced by 36 weeks of PMA &#40;<span class="elsevierStyleItalic">z</span> of approximately &#8722;1&#46;6&#41; and was sustained until discharge &#40;<span class="elsevierStyleItalic">z</span> of approximately &#8722;1&#46;7&#41;&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><elsevierMultimedia ident="fig0005"></elsevierMultimedia><elsevierMultimedia ident="fig0010"></elsevierMultimedia><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><elsevierMultimedia ident="fig0015"></elsevierMultimedia><elsevierMultimedia ident="tbl0015"></elsevierMultimedia><p id="par0030" class="elsevierStylePara elsevierViewall">When it came to length and HC&#44; we could not graph growth curves due to the lack of intermediate measurements&#46; <a class="elsevierStyleCrossRefs" href="#tbl0020">Tables 4 and 5</a> show the length and HC values at birth and at discharge with their corresponding <span class="elsevierStyleItalic">z</span>-scores&#46; For both variables&#44; the <span class="elsevierStyleItalic">z</span>-scores of our patients at birth were near zero&#44; that is&#44; they were at the 50th percentile in the reference tables&#46; However&#44; at the time of discharge the <span class="elsevierStyleItalic">z</span>-scores for HC had decreased by approximately 0&#46;7&#44; roughly approximating the 25th percentile&#44; and by about 2 for length &#40;&#8804;3rd percentile&#41;&#46;</p><elsevierMultimedia ident="tbl0020"></elsevierMultimedia><elsevierMultimedia ident="tbl0025"></elsevierMultimedia></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Discussion</span><p id="par0035" class="elsevierStylePara elsevierViewall">Our study&#44; which analysed a large contemporary cohort of EPIs representative of every geographical area in Spain&#44; showed that despite recent advances in perinatal care and the theoretical improvements introduced in the nutrition of very preterm infants&#44; growth in the early weeks of extrauterine life is slower than intrauterine growth&#46; Although the chosen time points for weight measurement were arbitrary&#44; the WGV followed a sinusoidal pattern&#44; which could result partly from clinical and partly from methodological aspects&#46; We observed a slow weight gain in the first weeks of life&#44; which could correspond to an increased metabolic rate during the period of adaptation to extrauterine life and the most critical stages of acute illness in these patients&#44; as well as the real or perceived difficulties in providing adequate nutritional support&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">20</span></a> Furthermore&#44; during this phase&#44; the most immature newborns&#44; who were probably also more critically ill&#44; grew considerably slower than newborns with greater GAs&#46; Later on&#44; we observed an acceleration phase&#44; with a WGV from 28 days post birth to 36 weeks of PMA that approximated foetal growth for equivalent GAs&#46; During this phase&#44; the differences between GA groups disappeared&#46; A possible explanation is that the data collected during this period corresponds to survivors&#44; and therefore to less critically ill patients&#44; as those who died did so at a median of 5 days &#40;interquartile range&#44; 2&#8211;14&#46;25&#41;&#46; However&#44; starting from 36 weeks&#44; the data correspond to patients that remained hospitalised&#44; in whom complications and underlying disease were probably more frequent&#44; which could account for the renewed slowing of weight gain found in our study&#46; At any rate&#44; our data includes all the patients that were available at each time&#44; and therefore their longitudinal growth pattern may reflect multiple circumstances in addition to nutritional support&#44; such as genetic factors&#44; environmental factors&#44; disease severity&#44; complications&#44; etc&#46; In fact&#44; it is estimated that 50&#37; of the variance in early postnatal growth is due to non-nutritional factors&#46;<a class="elsevierStyleCrossRefs" href="#bib0305"><span class="elsevierStyleSup">21&#44;22</span></a> A recent study showed that healthy preterm infants adjust their extrauterine growth trajectories to &#8722;0&#46;8 <span class="elsevierStyleItalic">z</span>-scores below their intrauterine percentile after their initial physiologic adaptation&#44; which could be considered a natural transition from intrauterine to extrauterine growth trajectories&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">23</span></a></p><p id="par0040" class="elsevierStylePara elsevierViewall">An &#8220;adequate&#8221; weight curve is usually considered indicative of a healthy infant&#46; However&#44; in the case of preterm infants&#44; we do not know with certainty which are the best reference standards&#44; nor which growth pattern leads to the best possible outcomes in the long term&#46; Preterm birth itself may be the final outcome of a complicated gestation&#44; which means that preterm newborns could have weights below those of foetuses of the same GA that remain in utero&#46;<a class="elsevierStyleCrossRef" href="#bib0320"><span class="elsevierStyleSup">24</span></a> Furthermore&#44; the extrauterine environment constitutes a drastic change for newborns that requires the activation of multiple adaptive mechanisms&#44; with all the changes in metabolic rate and energy expenditure that this entails&#44; and is compounded by the illness associated with prematurity&#44; which may complicate the initiation and maintenance of enteral and parenteral nutrition&#46;<a class="elsevierStyleCrossRef" href="#bib0325"><span class="elsevierStyleSup">25</span></a> On the other hand&#44; we ought to note that weight gain itself is not necessarily indicative of adequate nutrition&#44; as it does not guarantee adequate changes in body composition&#46; Everyday clinical practice and most studies do not differentiate between gains in lean mass and fat mass&#46; Modern air-displacement plethysmography systems facilitate the assessment of body composition and weight gain quality&#44;<a class="elsevierStyleCrossRefs" href="#bib0330"><span class="elsevierStyleSup">26&#44;27</span></a> which combined with anthropometric measurements and the clinical follow-up of patients could help increase our knowledge or estimation of optimal growth patterns&#46;<a class="elsevierStyleCrossRef" href="#bib0340"><span class="elsevierStyleSup">28</span></a> Accelerated growth could lead to the development of metabolic and cardiovascular complications&#44; while excessively slow growth has been associated with poorer neurodevelopmental outcomes&#46;<a class="elsevierStyleCrossRefs" href="#bib0235"><span class="elsevierStyleSup">7&#8211;10&#44;29</span></a> In fact&#44; to date&#44; none of the growth patterns has proven superior to others as regards medium- to long-term health outcomes&#46; Some authors recommend against assigning patients target percentiles based on their birth weight&#44; and instead proposed that they be assigned based on weight at 2&#8211;3 weeks post birth&#44; that is&#44; once weight gain has steadied&#46;<a class="elsevierStyleCrossRef" href="#bib0350"><span class="elsevierStyleSup">30</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">The association between growth and motor and cognitive development in patients is still subject to debate&#46; It is generally accepted that EPIs are at high risk of both postnatal growth retardation and adverse neurodevelopmental outcomes&#46;<a class="elsevierStyleCrossRefs" href="#bib0355"><span class="elsevierStyleSup">31&#44;32</span></a> However&#44; the causal relationship between these two phenomena and their potential mechanisms remain largely unknown&#46; A recent study showed that a weight gain in the lowest quartile between 7 and 28 days of life is not associated with neurodevelopmental impairment&#44;<a class="elsevierStyleCrossRef" href="#bib0365"><span class="elsevierStyleSup">33</span></a> suggesting the possibility that underlying brain damage may itself be the cause of reduced growth in some cases&#46; Kan et al&#46; also found no association between intrauterine growth restriction and neurodevelopmental outcomes at age 8 years&#46;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">34</span></a> Furthermore&#44; this study found that weight at birth and subsequent ages had no significant impact on neurodevelopmental outcomes&#44; while smaller HCs at ages 2 and 8 years were associated with impairment&#46; The authors concluded that current nutritional practices do not have a negative impact on the neurodevelopmental outcomes of children born very preterm&#44; even if their body growth during childhood is smaller compared to their full-term peers&#46; Lastly&#44; and along the same lines&#44; studies on nutrient supplementation after hospital discharge have also failed to find solid evidence of its benefits on HC growth or neurodevelopmental outcomes&#46;<a class="elsevierStyleCrossRef" href="#bib0375"><span class="elsevierStyleSup">35</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">An interesting finding in our study was that postnatal growth restriction was more marked in length compared to weight or HC&#46; This pattern of changes in anthropometric parameters has also been observed by other authors&#44;<a class="elsevierStyleCrossRefs" href="#bib0380"><span class="elsevierStyleSup">36&#44;37</span></a> who have demonstrated that it persists past discharge from hospital&#46; This pattern differs from the classical pattern associated with malnutrition&#44; in which weight is more affected than height and HC&#46; This finding is important&#44; as linear growth reflects the increase in lean mass and protein accretion&#44; which in turn are indicative of the growth of organs&#44; including the brain&#44; whose growth is associated with the increase of neural processing speed in preterm infants&#46;<a class="elsevierStyleCrossRef" href="#bib0390"><span class="elsevierStyleSup">38</span></a> Although the optimal linear growth pattern is also not fully known&#44; recent evidence has shown that reduced linear growth is associated with poorer long-term cognitive outcomes&#46;<a class="elsevierStyleCrossRefs" href="#bib0385"><span class="elsevierStyleSup">37&#44;39&#44;40</span></a></p><p id="par0055" class="elsevierStylePara elsevierViewall">One of the limitations of our study is that fluid therapy and nutritional interventions were not documented systematically&#44; so we were not able to definitely establish their association with postnatal growth&#46; However&#44; one of its strengths is the large number of patients and of participating units&#44; which makes our findings representative of the anthropometric variations at birth in a large contemporary cohort of extremely preterm infants that&#44; in turn&#44; could be a reflection of current clinical practices&#46; Another limitation is that we do not have long-term follow-up data for this cohort of patients&#44; so we could not determine whether there is an association&#44; at least from an epidemiological standpoint&#44; between growth pattern and neurodevelopmental outcomes&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">In conclusion&#44; EPIs exhibit a slow WGV in the first weeks post birth that may be partly explained as a phenomenon of adaptation to extrauterine life&#46; It may be preferable to set the growth targets for these patients during their hospital stay not at the birth percentiles&#44; but at the percentiles that the patient is at when this initial adaptation is complete&#46; In any case&#44; the assessment of growth based solely on weight gain does not seem appropriate&#46; Close monitoring of linear and HC growth is essential for nutritional assessment and probably more important than weight gain in the detection of patients at risk of poor growth or neurodevelopmental outcomes after discharge from hospital&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Conflicts of interest</span><p id="par0065" class="elsevierStylePara elsevierViewall">The authors have no conflicts of interest to declare</p></span></span>"
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        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Introduction</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Postnatal growth restriction is considered a universal problem in extremely premature infants &#40;EPI&#41;&#44; and causes great concern due to the possible relationship between nutrition&#44; sub-optimal postnatal growth&#44; and neurodevelopment delay&#46;</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Objectives</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">To describe the weight gain in EPI and to determine the changes in the length and head circumference &#40;HC&#41; at hospital discharge in survivors&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Patients and methods</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">The study included 4520 Caucasian EPI from single pregnancies and without severe malformations&#44; born in the centres participating in the Spanish SEN1500 network &#40;2002&#8211;2011&#41;&#46; The weight was recorded at birth&#44; 28 days&#44; 36 weeks post-menstrual age &#40;PMA&#41;&#44; and at discharge&#46; The length and HC were measured at birth and at discharge&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Results</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">The rate of weight gain &#40;exponential method&#41; was 8&#46;0<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;day &#40;birth to 28 days&#41;&#59; 14&#46;3<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;day &#40;28 days to 36 weeks&#41;&#59; and 11&#46;7<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;day &#40;36 weeks to discharge&#41;&#46; At discharge&#44; postnatal growth restriction was greater for length &#40;<span class="elsevierStyleItalic">z</span>-score between &#8722;1&#46;78 and &#8722;2&#46;42&#44; depending on GA&#41;&#44; followed by weight &#40;&#8722;1&#46;67 to &#8722;1&#46;79&#41;&#44; and HC &#40;&#8722;0&#46;69 to &#8722;0&#46;81&#41;&#46;</p></span> <span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Conclusions</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Weight gain in the first weeks after birth is slow in EPI&#44; and they exhibit an almost universal postnatal growth restriction that involves mainly length and weight&#46; In addition to weight&#44; a close control of longitudinal growth and HC are essential for nutritional assessment and detection of patients at risk for poor growth and neurodevelopment after hospital discharge&#46;</p></span>"
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        "resumen" => "<span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Introducci&#243;n</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">La restricci&#243;n posnatal del crecimiento es considerada un problema universal en reci&#233;n nacidos extremadamente prematuros &#40;RNEP&#41;&#44; generando gran preocupaci&#243;n debido a la posible relaci&#243;n entre nutrici&#243;n&#44; crecimiento posnatal sub&#243;ptimo y alteraciones del neurodesarrollo&#46;</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Objetivos</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Describir la evoluci&#243;n de la ganancia posnatal de peso en RNEP y conocer los cambios en la longitud y el per&#237;metro craneal &#40;PC&#41; al alta hospitalaria en los supervivientes&#46;</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Pacientes y m&#233;todos</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Se estudi&#243; a 4&#46;520 RNEP de raza blanca&#44; de gestaciones &#250;nicas y sin malformaciones&#44; nacidos en los centros participantes en la red espa&#241;ola SEN1500 &#40;2002-2011&#41;&#46; El peso se registr&#243; al nacimiento&#44; 28 d&#237;as&#44; 36 semanas de edad posmenstrual y al alta hospitalaria&#46; La longitud y el PC se estudiaron al nacimiento y al alta&#46;</p></span> <span id="abst0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Resultados</span><p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">La velocidad de ganancia ponderal fue de 8&#44;0<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;d&#237;a &#40;nacimiento-28 d&#237;as&#41;&#59; 14&#44;3<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;d&#237;a &#40;28 d&#237;as-36 semanas&#41;&#44; y 11&#44;7<span class="elsevierStyleHsp" style=""></span>g&#47;kg&#47;d&#237;a &#40;36 semanas-alta hospitalaria&#41;&#46; Al alta&#44; la restricci&#243;n posnatal del crecimiento fue mayor para la longitud &#40;z-score entre &#8722;1&#44;78 y &#8722;2&#44;42&#44; en funci&#243;n de la edad gestacional&#41;&#44; seguida del peso &#40;&#8722;1&#44;67 a &#8722;1&#44;79&#41; y&#44; finalmente&#44; el PC &#40;&#8722;0&#44;69 a &#8722;0&#44;81&#41;&#46;</p></span> <span id="abst0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Conclusiones</span><p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Los RNEP presentan una velocidad de ganancia ponderal lenta en las primeras semanas tras el nacimiento y una restricci&#243;n posnatal del crecimiento que afecta en mayor grado a la longitud y al peso&#46; Adem&#225;s del peso&#44; un control estrecho del crecimiento longitudinal y del PC es fundamental para la valoraci&#243;n nutricional y la detecci&#243;n de pacientes de riesgo respecto al crecimiento y el neurodesarrollo tras el alta hospitalaria&#46;</p></span>"
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            "titulo" => "Introducci&#243;n"
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          1 => array:2 [
            "identificador" => "abst0035"
            "titulo" => "Objetivos"
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          2 => array:2 [
            "identificador" => "abst0040"
            "titulo" => "Pacientes y m&#233;todos"
          ]
          3 => array:2 [
            "identificador" => "abst0045"
            "titulo" => "Resultados"
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          4 => array:2 [
            "identificador" => "abst0050"
            "titulo" => "Conclusiones"
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    ]
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      0 => array:3 [
        "etiqueta" => "&#9674;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0040"><a class="elsevierStyleCrossRef" href="#sec0030">Appendix A</a> details the names of the hospitals and researchers of the SEN1500 neonatal network&#46;</p>"
        "identificador" => "fn1"
      ]
      1 => array:2 [
        "etiqueta" => "&#9734;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0030">Please cite this article as&#58; Garc&#237;a-Mu&#241;oz Rodrigo F&#44; Figueras Aloy J&#44; Saavedra Santana P&#44; Garc&#237;a-Alix A&#46; Crecimiento posnatal hasta el alta hospitalaria en reci&#233;n nacidos extremadamente prematuros espa&#241;oles&#46; An Pediatr &#40;Barc&#41;&#46; 2017&#59;87&#58;301&#8211;310&#46;</p>"
      ]
      2 => array:2 [
        "etiqueta" => "&#9734;&#9734;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0035">Previous presentation&#58; this study was presented in part at the XXV Congreso de Neonatolog&#237;a y Medicina Perinatal of the Sociedad Espa&#241;ola de Neonatolog&#237;a&#44; May 2015&#44; Seville&#44; Spain&#46;</p>"
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            "apendice" => "<p id="par0075" class="elsevierStylePara elsevierViewall">Complejo Hospitalario de Albacete &#40;Andr&#233;s Mart&#237;nez Guti&#233;rrez&#41;&#59; Hospital Universitario de Basurto &#40;Alberto P&#233;rez Legorburu&#41;&#59; Hospital del Bierzo &#40;Mar&#237;a Teresa Prada&#41;&#59; Hospital de Cabue&#241;es &#40;Rafael Garc&#237;a Mozo&#41;&#59; Hospital Carlos Haya &#40;Tom&#225;s S&#225;nchez Tamayo&#41;&#59; Hospital General de Castell&#243;n &#40;Ram&#243;n Aguilera Olmos&#41;&#59; Hospital Central de Asturias &#40;Bel&#233;n Fern&#225;ndez Colomer&#41;&#59; Hospital Cl&#237;nic de Barcelona &#40;Josep Figuera Aloy&#41;&#59; Hospital Cl&#237;nico San Carlos &#40;Araceli Corredera S&#225;nchez&#41;&#59; Hospital de Cruces &#40;Amaya Rodr&#237;guez Serna&#41;&#59; Hospital Universitario de Donostia &#40;M&#46; &#193;ngel Cortajarena Altuna&#41;&#59; Hospital de Elche &#40;Josep Mut Buigues&#41;&#59; Hospital General de Catalu&#241;a &#40;Laura Castells Vilella&#41;&#59; Hospital General de Granollers &#40;Israel Anquela Sanz&#41;&#59; Hospital Germans Trias i Pujol &#40;W&#46; Coroleu&#41;&#59; Hospital de Getafe &#40;Luc&#237;a Cabanillas Vilaplana&#41;&#59; Hospital Infanta Margarita &#40;Jos&#233; Mar&#237;a Barc&#237;a Ruiz&#41;&#59; Hospital de Jerez &#40;Dolores Esquivel Mora&#41;&#59; Hospital Juan Ram&#243;n Jim&#233;nez &#40;Jos&#233; &#193;ngel Morilla S&#225;nchez&#41;&#59; Hospital Juan XXIII &#40;Mar Alb&#250;jar&#41;&#59; Hospital de Le&#243;n &#40;Emilio &#193;lvaro Iglesias&#41;&#59; Hospital Miguel Servet &#40;Segundo Rite Gracia&#41;&#59; Corporaci&#243; Parc Taul&#237; &#40;Juan Badia&#41;&#59; Hospital San Juan de D&#233;u &#40;Mart&#237;n Iriondo Sanz&#41;&#59; Hospital San Pedro de Logro&#241;o &#40;In&#233;s Esteban D&#237;ez&#41;&#59; Hospital San Pedro de Alc&#225;ntara &#40;M&#170; Jes&#250;s L&#243;pez Cuesta&#41;&#59; Hospital de la Santa Creu i Sant Pau &#40;Gemma Ginovart Galiana&#41;&#59; Hospital Severo Ochoa &#40;Mar&#237;a Jos&#233; Santos Mu&#241;oz&#41;&#59; Hospital Txagorritxu &#40;Mar&#237;a Mercedes Mart&#237;nez Ayucar&#41;&#59; Hospital Universitario Arnau de Vilanova &#40;Eduard Sol&#233; Mir&#41;&#59; Hospital Valme &#40;Antonio Guti&#233;rrez Benjumea&#41;&#59; Hospital Virgen de la Concha &#40;V&#237;ctor Marug&#225;n Isabel&#41;&#59; Hospital UniversitarioVirgen de la Macarena &#40;Mercedes Granero Asencio&#41;&#59; Hospital Virgen de la Salud &#40;Alicia de Ureta Huertas&#41;&#59; Hospital UniversitarioVirgen de las Nieves &#40;M&#46; Fernanda Moreno Gald&#243;&#41;&#59; Hospital Xeral de Vigo &#40;Mar&#237;a Su&#225;rez Albo&#41;&#59; Hospital Universitario de Valencia &#40;Javier Esta&#241; Capell&#41;&#59; Hospital Universitario de Zaragoza &#40;Purificaci&#243;n Ventura Faci&#41;&#59; Hospital Universitario de Santiago &#40;M&#46; Luz Couce Pico&#41;&#59; Hospital General de Burgos &#40;Cristina de Frutos Mart&#237;nez&#41;&#59; Hospital General Universitario de Alicante &#40;Miriam Salvador Iglesias&#41;&#59; Hospital Universitario de Fuenlabrada &#40;Laura Domingo Comeche&#41;&#59; Hospital Universitario Gregorio Mara&#241;&#243;n &#40;Amparo Rodr&#237;guez Herreras&#41;&#59; Hospital Universitario La Paz &#40;M&#46; Dolores Elorza&#41;&#59; Hospital Materno Infantil de Canarias &#40;Lourdes Urqu&#237;a Mart&#237;&#41;&#59; Hospital Universitario de Canarias &#40;Pedro A&#46; Fuster Jorge&#41;&#59; Hospital Universitario de San Cecilio &#40;Eduardo Narbona&#41;&#59; Hospital Universitari i Polit&#232;cnic La Fe &#40;Isabel Izquierdo Maci&#225;n&#41;&#59; Hospital Universitario Reina Sof&#237;a &#40;Juana Mar&#237;a Guzm&#225;n Caba&#241;as&#41;&#59; Hospital Universitario R&#237;o Hortera &#40;M&#46; Mar Montejo Vicente&#41;&#59; Hospital Universitario de Salamanca &#40;Pilar Garc&#237;a Gonz&#225;lez&#41;&#59; Hospital Universitario Virgen del Roc&#237;o &#40;Carmen Mac&#237;as D&#237;az&#41;&#59; Hospital Universitario Dexeus &#40;Roser Porta&#41;&#59; Scias-Hospital Barcelona &#40;Silvia Mart&#237;nez-Nadal&#41;&#46; Hospital Josep Trueta &#40;Alberto Trujillo&#41;&#59; Complejo Hospitalario Universitario de Pontevedra &#40;Javier Vilas Gonz&#225;lez&#41;&#59; Hospital Universitario de Ciudad Real &#40;Miguel &#193;ngel Cabezas&#41;&#59; Hospital Puerta del Mar &#40;Antonio Segado Arenas&#41;&#59; Hospital Doce de Octubre &#40;Carmen R&#46; Pall&#225;s Alonso&#41;&#46;</p>"
            "etiqueta" => "Appendix A"
            "titulo" => "Hospitals and researchers of the SEN1500 neonatal network"
            "identificador" => "sec0030"
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          "en" => "<p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">Birth weight distribution by GA in 2490 boys and 2030 girls born at 28 or fewer weeks&#8217; gestation&#46; SEN1500 &#40;2002&#8211;2011&#41;&#46;</p>"
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                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Weeks of gestation&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">22&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">23&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">24&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">25&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">26&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">27&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">28&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Total&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Patients&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">21&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">145&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">463&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">674&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">958&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">1046&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">1213&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">4520&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Measurements&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">44&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">336&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">1277&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">2104&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">3135&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">3571&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">4213&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="center" valign="top">14<span class="elsevierStyleHsp" style=""></span>680&nbsp;\t\t\t\t\t\t\n
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                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Gestational age &#40;weeks&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">&#8804;24&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">26&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">27&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">28&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Total 22&#8211;28&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">P</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">From birth to 28 days of life</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>220&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>399&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>655&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>799&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1015&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>3088&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">7&#46;2 &#40;4&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">7&#46;2 &#40;5&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">7&#46;6 &#40;4&#46;5&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">7&#46;8 &#40;4&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">8&#46;9 &#40;4&#46;3&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">8&#46;0 &#40;4&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#60;&#46;001&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">From 28 days to 36 weeks of PMA</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>176&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>343&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>544&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>657&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>756&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2476&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">13&#46;9 &#40;3&#46;1&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">14&#46;0 &#40;3&#46;5&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">14&#46;6 &#40;3&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">14&#46;4 &#40;3&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">14&#46;4 &#40;4&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">14&#46;3 &#40;3&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#46;080&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">From 36 weeks of PMA to hospital discharge</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>177&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>326&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>492&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>587&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>668&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2250&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">12&#46;5 &#40;6&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">12&#46;0 &#40;5&#46;9&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">11&#46;5 &#40;6&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">11&#46;7 &#40;6&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">11&#46;5 &#40;7&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">11&#46;7 &#40;6&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#46;367&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab1604433.png"
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        "descripcion" => array:1 [
          "en" => "<p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">Weight gain velocity &#40;in g&#47;kg&#47;day&#41; by gestational age&#44; in 3 intervals&#46; Calculations were performed using the exponential method&#46;</p>"
        ]
      ]
      5 => array:8 [
        "identificador" => "tbl0015"
        "etiqueta" => "Table 3"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "detalles" => array:1 [
          0 => array:3 [
            "identificador" => "at3"
            "detalle" => "Table "
            "rol" => "short"
          ]
        ]
        "tabla" => array:3 [
          "leyenda" => "<p id="spar0090" class="elsevierStyleSimplePara elsevierViewall">All values are expressed as mean &#40;standard deviation&#41;&#46;</p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">GA &#40;weeks&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Birth weight &#40;g&#41;<br>&#40;<span class="elsevierStyleItalic">N</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>4520&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Birth weight <span class="elsevierStyleItalic">z</span>-score<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Weight at 28 days &#40;g&#41;<br>&#40;<span class="elsevierStyleItalic">N</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>3102&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Weight at 28 days<br><span class="elsevierStyleItalic">z</span>-score<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Weight at 36 weeks&#8217; PMA &#40;g&#41;<br>&#40;<span class="elsevierStyleItalic">N</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2554&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Weight at 36 weeks&#8217; PMA<br><span class="elsevierStyleItalic">z</span>-score<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">PMA at discharge in survivors &#40;weeks&#41;<br>&#40;<span class="elsevierStyleItalic">N</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2984&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Weight at discharge in survivors &#40;g&#41;<br>&#40;<span class="elsevierStyleItalic">N</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2982&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Weight at discharge<br><span class="elsevierStyleItalic">z</span>-score<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">22&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>21<br>526 &#40;67&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1<br>730&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1<br>2870&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1<br>38&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1<br>3300&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">23&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>145<br>612 &#40;91&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&#46;08 &#40;1&#46;18&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>25<br>831 &#40;144&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;0&#46;81 &#40;0&#46;85&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>21<br>1891 &#40;521&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;70 &#40;1&#46;03&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>19<br>42&#46;1 &#40;4&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>19<br>3172 &#40;816&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">24&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>463<br>679 &#40;98&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&#46;11 &#40;1&#46;05&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>194<br>854 &#40;140&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;21 &#40;0&#46;69&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>159<br>1863 &#40;140&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;76 &#40;0&#46;62&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>164<br>41&#46;2 &#40;4&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>164<br>2795 &#40;673&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;67 &#40;1&#46;34&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">25&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>674<br>769 &#40;125&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&#46;09 &#40;1&#46;06&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>401<br>969 &#40;194&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;23 &#40;0&#46;87&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>357<br>1927 &#40;392&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;63 &#40;0&#46;78&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>372<br>40&#46;0 &#40;3&#46;9&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>372<br>2671 &#40;593&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;79 &#40;1&#46;23&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">26&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>958<br>867 &#40;156&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&#46;07 &#40;1&#46;08&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>660<br>1087 &#40;206&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;27 &#40;0&#46;81&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>561<br>1972 &#40;366&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;54 &#40;0&#46;73&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>629<br>38&#46;9 &#40;3&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;73 &#40;1&#46;08&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">27&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1046<br>964 &#40;189&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;0&#46;02 &#40;1&#46;12&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>803<br>1222 &#40;245&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;36 &#40;0&#46;90&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>788<br>38&#46;4 &#40;4&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>786<br>2463 &#40;482&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;73 &#40;0&#46;95&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">28&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1213<br>1075 &#40;229&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;0&#46;12 &#40;1&#46;13&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1018<br>1388 &#40;279&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;29 &#40;0&#46;92&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>773<br>1983 &#40;388&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;52 &#40;0&#46;77&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1011<br>37&#46;9 &#40;4&#46;1&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1010<br>2420 &#40;457&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;71 &#40;0&#46;92&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
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                0 => "xTab1604434.png"
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            0 => array:3 [
              "identificador" => "tblfn0005"
              "etiqueta" => "a"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0005">The <span class="elsevierStyleItalic">z</span>-scores were calculated based on the average of the pooled values of both sexes in the tables of Olsen et al&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">3</span></a></p>"
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0085" class="elsevierStyleSimplePara elsevierViewall">Changes in weight from birth to hospital discharge in extremely preterm infants&#46;</p>"
        ]
      ]
      6 => array:8 [
        "identificador" => "tbl0020"
        "etiqueta" => "Table 4"
        "tipo" => "MULTIMEDIATABLA"
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        "detalles" => array:1 [
          0 => array:3 [
            "identificador" => "at4"
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        "tabla" => array:3 [
          "leyenda" => "<p id="spar0100" class="elsevierStyleSimplePara elsevierViewall">All values are expressed as mean &#40;standard deviation&#41;&#46;</p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
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                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">GA at birth &#40;weeks&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Birth length &#40;cm&#41;<br>&#40;<span class="elsevierStyleItalic">N</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>4049&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">z</span>-score<a class="elsevierStyleCrossRef" href="#tblfn0010"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Length at discharge<a class="elsevierStyleCrossRef" href="#tblfn0015"><span class="elsevierStyleSup">b</span></a> in survivors &#40;cm&#41;<br>&#40;<span class="elsevierStyleItalic">N</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2658&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">z</span>-score<a class="elsevierStyleCrossRef" href="#tblfn0010"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">22&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>13<br>29&#46;0 &#40;2&#46;7&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">23&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>106<br>30&#46;3 &#40;2&#46;1&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&#46;004 &#40;1&#46;25&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>380<br>31&#46;5 &#40;1&#46;9&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">25&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;2&#46;05 &#40;1&#46;39&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">27&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&#46;005 &#40;1&#46;10&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>696<br>45&#46;2 &#40;2&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;99 &#40;1&#46;02&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">28&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;0&#46;16 &#40;1&#46;20&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8722;1&#46;78 &#40;0&#46;98&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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            0 => array:3 [
              "identificador" => "tblfn0010"
              "etiqueta" => "a"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0010">The <span class="elsevierStyleItalic">z</span>-scores were calculated based on the average of the pooled values of both sexes in the tables of Olsen et al&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">3</span></a></p>"
            ]
            1 => array:3 [
              "identificador" => "tblfn0015"
              "etiqueta" => "b"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0015">The PMA at discharge for each GA is shown in <a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a>&#46;</p>"
            ]
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        "descripcion" => array:1 [
          "en" => "<p id="spar0095" class="elsevierStyleSimplePara elsevierViewall">Length at birth and at discharge in extremely premature infants&#46;</p>"
        ]
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          "leyenda" => "<p id="spar0110" class="elsevierStyleSimplePara elsevierViewall">All values are expressed as mean &#40;standard deviation&#41;&#46;</p>"
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            0 => array:2 [
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                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">GA at birth &#40;weeks&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Birth HC &#40;cm&#41;<br>&#40;<span class="elsevierStyleItalic">N</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>4065&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">z</span>-score<a class="elsevierStyleCrossRef" href="#tblfn0020"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">HC at discharge<a class="elsevierStyleCrossRef" href="#tblfn0025"><span class="elsevierStyleSup">b</span></a> in survivors &#40;cm&#41;<br>&#40;<span class="elsevierStyleItalic">N</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2680&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">z</span>-score<a class="elsevierStyleCrossRef" href="#tblfn0020"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">22&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>11<br>20&#46;2 &#40;1&#46;3&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="char" valign="top">23&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>105<br>21&#46;3 &#40;1&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
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              "nota" => "<p class="elsevierStyleNotepara" id="npar0020">The <span class="elsevierStyleItalic">z</span>-scores were calculated based on the average of the pooled values of both sexes in the tables of Olsen et al&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">3</span></a></p>"
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                      "autores" => array:1 [
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                          "etal" => false
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                  "host" => array:1 [
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                    0 => array:2 [
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                          "etal" => false
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ISSN: 23412879
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