文章基本信息

标题：Prepregnancy body mass index, gestational weight gain, and birth weight in the BRISA cohort
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作者：Raina Jansen Cutrim Propp Lima ; Rosângela Fernandes Lucena Batista ; Marizélia Rodrigues Costa Ribeiro 等
期刊名称：Revista de Saúde Pública
印刷版ISSN：0034-8910
出版年度：2018
卷号：52
DOI：10.11606/S1518-8787.2018052000125
语种：English
出版社：Universidade de São Paulo
摘要：ABSTRACTOBJECTIVETo analyze the effects of maternal pre-pregnancy body mass index and weight gain during pregnancy on the baby's birth weight.METHODSWe conducted a cross-sectional study with 5,024 mothers and their newborns using a Brazilian birth cohort study. In the proposed model, estimated by structural equation modeling, we tested socioeconomic status, age, marital status, pre-pregnancy body mass index, smoking habit and alcohol consumption during pregnancy, hypertension and gestational diabetes, gestational weight gain, and type of delivery as determinants of the baby's birth weight.RESULTSFor a gain of 4 kg/m2(1 Standard Deviation [SD]) in pre-pregnancy body mass index, there was a 0.126 SD increase in birth weight, corresponding to 68 grams (p < 0.001). A 6 kg increase (1 SD) in gestational weight gain represented a 0.280 SD increase in newborn weight, correponding to 151.2 grams (p < 0.001). The positive effect of pre-pregnancy body mass index on birth weight was direct (standardized coefficient [SC] = 0.202; p < 0.001), but the negative indirect effect was small (SC = -0.076, p < 0.001) and partially mediated by the lower weight gain during pregnancy (SC = -0.070, p < 0.001). The positive effect of weight gain during pregnany on birth weight was predominantly direct (SC = 0.269, p < 0.001), with a small indirect effect of cesarean delivery (SC = 0.011; p < 0.001). Women with a higher pre-pregnancy body mass index gained less weight during pregnancy (p < 0.001).CONCLUSIONSThe effect of gestational weight gain on the increase in birth weight was greater than that of pre-pregnancy body mass index.