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The purpose of this study was to investigate effect of in-crease in body mass index(BMI )category on obstetric outcomes.A cohort study was conducted from 1999to2002.Women with singleton pregnancies were placed in standard BMI categories.Increase i n BMI was calculated as difference between initial BMI an d delivery BMI.ANOVA was used to compare continuous variables,and chi -square test for categorical variables.This study in-cluded 5131women:49.8%had no change in BMI cate-gory,43.9%increased by 1BMI category,and 6.3%by>1category.Increase in BMI category was associated with higher rates of gestational diabete s(P =.005),failed in-duction(P<.001),lacerations(P<.001),cesarean de-liveries(P<.001),and postpartum infection(P =.007)in normal weight women.Overweightw omen also had in-creased rates of preeclampsia(P =.002)and operative vaginal deliveries(P<.001).Obese women had higher rates of chorioamnionitis(P =.003),failed induction(P<.001),and cesarean deliveries(P =.016).In-crease in BMI category is associated with increased risk of complications.
The purpose of this study was to investigate the effect of in-crease in body mass index (BMI) category on obstetric outcomes.A cohort study was conducted from 1999 to 2002.Women with singleton pregnancies were placed in standard BMI categories.Increase in BMI was calculated as difference between initial BMI an d delivery BMI. ANOVA was used to compare continuous variables, and chi-square test for categorical variables. This study in-cluded 5131 women: 49.8% had no change in BMI cate-gory, 43.9% increased by 1BMI category , and 6.3% by> 1category. Crease in BMI category was associated with higher rates of gestational diabetes (P = .005), failed in-duction (P .001), lacerations (P <.001), cesarean de- Liveries (P <.001), and postpartum infection (P = .007) in normal weight women. Overweight women also had in-creased rates of preeclampsia (P = .002) and operative vaginal deliveries (P <.001). Obese women had higher rates of chorioamnionitis (P = .003), failed induction (P <.001), and cesarean deliveries (P = .016) .In-crease in BMIc ategory is associated with increased risk of complications.