Behavior of full term small-for-gestational-age infants in the first year of life / Comportamento de lactentes nascidos a termo pequenos para a idade gestacional no primeiro ano de vida




The objective of this study was to compare the behavior of full-term small-for-gestational age (SGA) with full-term appropriate-for gestational age (AGA) infants in the first year of life. A hundred twenty five full-term neonates were selected at Neonatology Service in the Center of Integral Attention to Woman?s Health (CAISM) of the State University of Campinas (UNICAMP), São Paulo, Brazil observing the inclusion criteria as follow: parents or legal guardians who signed the Informed Consent; neonates who did not need special care; gestational age between 37 and 41 weeks. They were assessed in the 1st , 2nd ,3rd ,6th ,9th and 12th months of life. Ninety five infants who came at least to one assessment during the first year of life were the sample. This sample was divided into two groups, according to weight and gestational age. In the SGA group there were 33 infants with birth weight less than percentile 10th and, in the AGA group, there were 62 infants whose birth weight varies between the 10th and 90th percentile on fetal growing Battaglia and Lubchenco method (1967). The Bayley Scales of Infant Development-II (BSID-II) (BAYLEY, 1993) were used with emphasis on the Behavior Rating Scale (BRS). The cross-sectional study evaluated in the 1st month, 63 infants (18 SGA and 45 AGA); in the 2nd month, 68 infants (25 SGA and 43 AGA); in the 3rd month, 68 infants (22 SGA and 46 AGA); in the 6th month, 67 infants (25 SGA and 42 AGA); in the 9th month, 61 infants (22 SGA and 39 AGA); in the 12th month, 68 infants (21 SGA and 47 AGA). The groups showed similar distribution in biologic variables on birth, except birth weight. The SGA group showed lower birth weight than AGA, with significant difference between them (p<0.001). No differences were observed in Mental and Motor Scales performance. No differences were observed in the IS of the Mental Scale. The Motor Scale median comparison showed lower IS in the SGA with significant difference in the 2th month (p=0.008) and in the 12th month (p=0.047). Considering in the BRS, it was observed that the inadequate performance was associated in the 2nd month (p=0.048) to a bigger number of SGA infants, classified as inadequate. As the results of performance of BRS factors are concerned, the Attention/Arousal Factor displayed significantly lower average values (p=0.005) in SGA group. The percentile results in BRS showed significant difference in the 2nd (p=0.001) e 3rd (p=0.003) months, with lower medium values in the SGA group. The Motor Factor displayed significantly lower average values in the SGA group in the 2nd month (p=0.045) with medium values lower in the SGA group


infant retardo do crescimento fetal infant behavior desenvolvimento infantil infant comportamento do lactente recem-nascidos - peso baixo fetal grrowth retardation lactentes - crescimento child development

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