Pre-Pregnancy Maternal Body Mass Index and Preterm Delivery
American Journal of Obstetrics and Gynecology, 06/15/2012
Khatibi A et al. – Pre–pregnancy maternal overweight increases the risk of PTD. This increases the risk of both early and late PTD.Methods
- Prospective data from 83,544 pregnancies in the Norwegian Mother and Child Cohort Study.
- PTD was divided into early PTD (22+0 to 31+6 weeks) and late PTD (32+0 to 36+6 weeks).
- The overall prevalence of PTD was 5.1%. Increased BMI was associated with an increased risk of PTD, with adjusted odds ratio (AOR) ranging from 1.11 (95% confidence interval (CI) 1.03–1.20) for pre–obese to AOR 2.00 (95% CI 1.48–2.71) for grade–III obesity in the group including all PTD subgroups.
- Grade–III obese women had an increased risk of both early and late PTD: AOR 3.24 (95% CI 1.71–6.14) and AOR 1.81 (95% CI 1.29–2.54), respectively.