Table 2.

Multilevel Logistic Regression Analysis Showing the Relation Between Maternal Body Mass Index and Postpartum Hemorrhage including Diabetes and Hypertensive Disorders of Pregnancy as Co-Variates.

	PPH*
BMI	Adjusted OR (99% CI)
<18.5	0.92 (0.87 – 0.98)
18.5 – 24.9	Reference
25 – 29.9	1.04 (1.01 – 1.07)
30 – 34.9	1.05 (1.01 – 1.09)
35 – 39.9	0.97 (0.92 – 1.02)
≥ 40	0.96 (0.9 – 1.03)

BMI = body mass index; PPH = postpartum hemorrhage; OR = odds ratio

^*Hierarchical model adjusted for Maternal Age, Race/Ethnicity, Insurance, Education, Chronic Hypertension, Trimester when Prenatal Care was initiated, Gestational Age at Delivery, Parity, Multiple Gestation, Previous cesarean section, Labor, Prolonged Labor, Induction of Labor, Chorioamnionitis, Placental Abruption, Polyhydramnios, Previa, Fibroids, Diabetes (pre-existing or gestational), Gestational hypertension, Pre-eclampsia, Stillbirth, Mode of Delivery; Hospital site was considered as a random effect, to account for patient clustering.