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Waist-to-Hip Ratio versus Body Mass Index as Predictor of Obesity-Related Pregnancy Outcomes

Citation

McDonnold, Mollie; Mele, Lisa; Myatt, Leslie; Hauth, John C.; Leveno, Kenneth J.; Reddy, Uma M.; Mercer, Brian M., for the; Eunice Kennedy Shriver; National Institute of Child Health Human Development (NICHD) Maternal-Fetal Medicine Units (MFMU) Network [; & John M. Thorp, Jr., Member, et al. (2016). Waist-to-Hip Ratio versus Body Mass Index as Predictor of Obesity-Related Pregnancy Outcomes. American Journal of Perinatology, 33(6), 618-623. PMCID: PMC5258113

Abstract

Objective: In nonpregnant populations the waist-to-hip ratio (WHR) is a better predictor of obesity-related outcomes than body mass index (BMI). Our objective was to determine, in pregnancy, the relationship between these measures of obesity, and large-for-gestational age (LGA) and cesarean delivery (CD).
Methods: This is a secondary analysis of data from the Combined Antioxidant and Preeclampsia Prediction Study. Women with a WHR of >/= 0.85 and 0.80 to 0.84 at 9 to 16 weeks gestation were compared with those with a WHR < 0.80. Women with early pregnancy BMI >/= 30.0 kg/m(2) (obese) and 25.0 to 29.9 kg/m(2) (overweight) were compared with those < 25.0 kg/m(2). LGA was defined as > 90% by Alexander nomogram. Univariable analysis, logistic regression, and receiver operating characteristic curves were used.
Results: Data from 2,276 women were analyzed. After correcting for potential confounders, only BMI >/= 30 was significantly associated with LGA (adjusted odds ratio [aOR]: 2.07, 1.35-3.16) while BMI 25.0-29.9 (aOR: 1.5, 0.98-2.28), WHR 0.8-0.84 (aOR: 1.33, 0.83-2.13), and WHR >/= 0.85 (aOR: 1.05, 0.67-1.65) were not. Risk for CD was increased for women with elevated WHR and with higher BMI compared with normal. Conclusion: WHR is not associated with LGA. While BMI performed better than WHR, neither was a strong predictor of LGA or need for CD in low-risk nulliparous women.

URL

http://dx.doi.org/10.1055/s-0035-1569986

Reference Type

Journal Article

Year Published

2016

Journal Title

American Journal of Perinatology

Author(s)

McDonnold, Mollie
Mele, Lisa
Myatt, Leslie
Hauth, John C.
Leveno, Kenneth J.
Reddy, Uma M.
Mercer, Brian M., for the
Eunice Kennedy Shriver
National Institute of Child Health Human Development (NICHD) Maternal-Fetal Medicine Units (MFMU) Network [
John M. Thorp, Jr., Member
]

PMCID

PMC5258113