We studied the association of WIC prenatal supplementation with pregnancy outcome using Missouri WIC participants who delivered in 1982 linked with their offspring's birth/fetal death certificates. A 93 per cent match rate resulted in a final study population of 9,411 pregnancies. A control population of like number was acquired by matching on key demographic characteristics. The majority of the results generally confirm the results of a 1980 Missouri study; WIC participation was associated with decreases in low birthweight (7.8 vs 9.2 per cent), prematurity (9.7 vs 12.0 per cent) and inadequate prenatal care (30.5 vs 31.7 per cent), and an increase in mean gestational age (39.9 vs 39.6 weeks). Low birthweight rates were lower for infants of WIC participants in each of the risk categories reviewed. As noted in the 1980 study, duration of WIC of at least seven months was needed before improvements in birthweight outcomes measures were noted.
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机译：我们使用1982年分娩的密苏里州WIC参与者及其后代的出生/胎儿死亡证明来研究WIC产前补充与妊娠结局的关系。 93％的匹配率导致最终研究人群有9,411例怀孕。通过匹配关键人口统计学特征，获得了相同数量的对照人群。大多数结果大体上证实了1980年密苏里州一项研究的结果。参加WIC与低出生体重下降（7.8 vs 9.2％），早产（9.7 vs 12.0％）和产前护理不足（30.5 vs 31.7％）以及平均胎龄增加（39.9 vs 39.6周）有关。 。在所审查的每种风险类别中，WIC参与者的婴儿的低出生体重率较低。正如1980年的研究所指出的，在注意到出生体重结局指标得到改善之前，WIC的持续时间至少需要七个月。
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