Table 3.

Multivariable log‐binomial regression to show the association of BMI category at ANC booking and intrapartum obstetric complications among pregnant women delivered at KCMC hospital, Northern Tanzania (N = 12 759)

Intrapartum obstetric complications	BMI Category at First Antenatal Booking
	Unadjusted model					Adjusted model
	<25	25.0‐29.9		≥30		<25	25.0‐29.9		≥30
	RR [95% CI]	RR [95% CI]	P value	RR [95% CI]	P value	aRR [95% CI]	aRR [95% CI]	P value	aRR [95% CI]	P value
Elective CS	Ref	1.87 [1.52‐2.29]	<.001	3.51 [2.80‐4.40]	<.001	Ref	1.42 [1.14‐1.76]	.002	2.40 [1.88‐3.06]	<.001
Emergency CS	Ref	1.26 [1.15‐1.39]	<.001	1.60 [1.41‐1.81]	<.001	Ref	1.22 [1.11‐1.35]	<.001	1.53 [1.34‐1.75]	<.001
Preeclampsia	Ref	1.74 [1.41‐2.15]	<.001	3.19 [2.54‐4.01]	<.001	Ref	1.61 [1.30‐2.01]	<.001	2.66 [2.08‐3.40]	<.001
PPH	Ref	1.22 [1.05‐1.42]	.010	1.41 [1.16‐1.71]	<.001	Ref	1.13 [0.97‐1.33]	.117	1.22 [1.00‐1.49]	.050
PIH	Ref	2.28 [1.47‐3.52]	<.001	3.32 [2.03‐5.41]	<.001	Ref	1.87 [1.19‐2.94]	.007	2.13 [1.26‐3.62]	.005

Adjusted model: adjusted for maternal age, parity, mothers education, mothers residence, marital status, religion, economic activity, and ethnical group. Bold P values indicates significant associations.

Abbreviations: ANC, antenatal care; aRR, adjusted risk ratio; BMI, body mass index; CI, confidence interval; KCMC, Kilimanjaro Christian Medical Centre; PIH, pregnancy‐induced hypertension; PPH, postpartum haemorrhage; RR, relative risk.