METHODS: We used data from the 2004-2019 waves of the Pregnancy Risk Assessment Monitoring System, a serial cross-sectional national dataset including over 20 states. We conducted a quasi-experimental difference-in-differences analysis to assess pre/post changes in maternal and infant outcomes among women who were obese, while \"differencing out\" the pre/post changes among a control group of women who were overweight. Maternal outcomes included GWG and gestational diabetes; infant outcomes included preterm birth (PTB), low birthweight (LBW), and very low birthweight (VLBW). Analysis began in March 2021.
RESULTS: There was no association between the revised guidelines and GWG or gestational diabetes. The revised guidelines were associated with reduced PTB (- 1.19% points, 95%CI: - 1.86, - 0.52), LBW (- 1.38% points 95%CI: - 2.07, - 0.70), and VLBW (- 1.30% points, 95%CI: - 1.68, - 0.92). Results were robust to several sensitivity analyses.
CONCLUSIONS: The revised 2009 GWG guidelines were not associated with changes in GWG or gestational diabetes but were associated with improvements in infant birth outcomes. These findings will help inform further programs and policies aimed at improving maternal and infant health by addressing weight gain in pregnancy.
方法:我们使用了2004-2019年怀孕风险评估监测系统波的数据,
结果:修订后的指南与GWG或妊娠期糖尿病没有关联。
结论:2009年修订的GWG指南与GWG或妊娠糖尿病的变化无关,但与婴儿出生结局的改善有关。