Journal of perinatology : official journal of the California Perinatal Association · 2012
Does increasing body mass index affect cerclage efficacy?
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Poggi S H, Vyas N A, Pezzullo J C, Landy H J, Ghidini A
Аннотация
OBJECTIVE: To study the relationship between body mass index (BMI) and gestational age (GA) at delivery in patients with cervical insufficiency (CI) undergoing cerclage.
STUDY DESIGN: We accessed a database of patients with singleton gestations undergoing cerclage (N=168) for a well-characterized history of CI, shortened cervix <2.5 cm with a history of prior preterm delivery or prolapse of membranes through the external os. Univariate and multivariate logistic regression analysis were performed to compare obstetrical outcomes between obese and normal-weight patients.
RESULT: Prior preterm delivery <35 weeks in obese vs normal-weight patients was significantly higher (44% vs 9%), odds ratio=6.9 (95% CI: 2.5, 18.5), with lower mean GA at delivery (32.6±7.0 vs 37.2±3.4 weeks, P<0.001). After controlling for confounders, BMI remained significantly predictive of prematurity (coefficient: -0.12, adjusted R (2)=0.24), such that every additional 1 unit of BMI was associated with a 1-day reduction in GA at delivery (P=0.03).
CONCLUSION: An inverse correlation exists between BMI and GA at delivery in patients with CI receiving cerclage. The findings are unexpected given the protective effect of obesity on spontaneous preterm delivery.
STUDY DESIGN: We accessed a database of patients with singleton gestations undergoing cerclage (N=168) for a well-characterized history of CI, shortened cervix <2.5 cm with a history of prior preterm delivery or prolapse of membranes through the external os. Univariate and multivariate logistic regression analysis were performed to compare obstetrical outcomes between obese and normal-weight patients.
RESULT: Prior preterm delivery <35 weeks in obese vs normal-weight patients was significantly higher (44% vs 9%), odds ratio=6.9 (95% CI: 2.5, 18.5), with lower mean GA at delivery (32.6±7.0 vs 37.2±3.4 weeks, P<0.001). After controlling for confounders, BMI remained significantly predictive of prematurity (coefficient: -0.12, adjusted R (2)=0.24), such that every additional 1 unit of BMI was associated with a 1-day reduction in GA at delivery (P=0.03).
CONCLUSION: An inverse correlation exists between BMI and GA at delivery in patients with CI receiving cerclage. The findings are unexpected given the protective effect of obesity on spontaneous preterm delivery.