The Association of Prepregnancy Body Mass Index with Pregnancy Outcomes in Chinese Women

Table 5

Odds ratio for pregnancy outcomes by prepregnancy BMI categories.

Pregnancy outcomes	Underweight ()	Normal ()	Overweight ()	Obese ()
Gestational diabetes^a	0.783 (0.495-1.240)	Ref	0.993 (0.699-1.410)	2.649 (1.701-4.126)
PPROM^b	1.864 (1.269-2.737)	Ref	0.850 (0.577-1.250)	1.090 (0.630-1.889)
Anemia^c	1.218 (0.788-1.884)	Ref	0.971 (0.662-1.424)	0.300 (0.128-0.704)
Postpartum hemorrhage^d	0.728 (0.338-1.565)	Ref	1.460 (0.876-2.432)	1.468 (0.684-3.152)
Preeclampsia^e	0.368 (0.049-2.781)	Ref	1.319 (0.512-3.394)	3.654 (1.420-9.404)

Note: ^amodel adjusted for age, conception method, the number of pregnancies, anemia, and preeclampsia. ^bModel adjusted for age, conception method, the number of pregnancies, gestational diabetes, anemia, and preeclampsia. ^cModel adjusted for age, conception method, the number of pregnancies, gestational diabetes, and preeclampsia. ^dModel adjusted for age, conception method, the number of pregnancies, gestational diabetes, anemia, PPROM, and preeclampsia. ^eModel adjusted for age, conception method, the number of pregnancies, gestational diabetes, and anemia. Abbreviations: BMI: body mass index; PPROM: preterm premature rupture of membranes.