OBJECTIVE: The purpose of this study is to determine the association between body mass index (BMI) and success of ECV.
METHODS: This is a cross-sectional analysis of singleton live births in the USA from 2010 to 2014 using birth certificate data. Patients were assigned a BMI category according to standard WHO classification. Comparisons of success of ECV between the BMI categories were made using chi-square analysis with normal BMI as the reference group. Cochran-Armitage test was performed to look for a trend of decreasing success of ECV as BMI increased. The odds for successful ECV were estimated using multivariate logistic regression analysis, adjusting for possible confounders.
RESULTS: A total of 51,002 patients with documented ECV were available for analysis. There was a decreased success rate for ECV as BMI increased (p < .01). Women with a BMI of 40 kg/m 2 or greater had a 58.5% success rate of ECV; women with a normal BMI had 65.0% success rate of ECV. Multivariate analyses demonstrated significant decrease in success of ECV in women with BMI of 40 kg/m 2 or greater (OR 0.621, CI 0.542-0.712). Among women with BMI of 40 kg/m 2 or greater with successful ECV, 59.5% delivered vaginally. In contrast, 81.0% of women with normal BMI and successful ECV delivered vaginally.
CONCLUSIONS: Morbidly obese women have decreased success rate of ECV as BMI increases and decreased vaginal delivery rates after successful ECV.
Bibliographical notePublisher Copyright:
© 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.
- External cephalic version
- body mass index
- Body Mass Index
- Obesity, Morbid/complications
- Cross-Sectional Studies
- Middle Aged
- Logistic Models
- Treatment Outcome
- Labor Presentation
- Chi-Square Distribution
- Case-Control Studies
- Version, Fetal/statistics & numerical data
- Young Adult
- Delivery, Obstetric/statistics & numerical data
- Pregnancy Complications/epidemiology
PubMed: MeSH publication types
- Journal Article