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Terry J. Rosenberg, PhD, Samantha Garbers, MPA, Heather Lipkind, MD and Mary Ann Chiasson, DrPH

Terry J. Rosenberg, Samantha Garbers, and Mary Ann Chiasson are affiliated with the Medical Health and Research Association (MHRA) of New York City, Inc, New York, NY. Heather Lipkind is with the Columbia University College of Physicians and Surgeons, Department of Obstetrics and Gynecology, New York, NY.

Correspondence: Requests for reprints should be sent to Terry Rosenberg, PhD, MHRA, 40 Worth St, Suite 720, New York, NY 10013 (e-mail: trosenberg{at}mhra.org).

Objectives. We examined associations between obesity, diabetes, and 3 adverse pregnancy outcomes—primary cesarean delivery, preterm birth, and low birth-weight (LBW)—by racial/ethnic group. Our goal was to better understand how these associations differentially impact birth outcomes by group in order to develop more focused interventions.

Methods. Data were collected from the 1999, 2000, and 2001 New York City birth files for 329988 singleton births containing information on prepregnancy weight and prenatal weight gain. Separate logistic regressions for 4 racial/ethnic groups predicted the adverse pregnancy outcomes associated with diabetes. Other variables in the regressions included obesity, excess weight gain, hypertension, preeclampsia, and substance use during pregnancy (e.g., smoking).

Results. Chronic and gestational diabetes were significant risks for a primary cesarean and for preterm birth in all women. Diabetes as a risk for LBW varied by group. For example, whereas chronic diabetes increased the risk for LBW among Asians, Hispanics, and Whites (adjusted odds ratios=2.28, 1.69, and 1.59), respectively, it was not a significant predictor of LBW among Blacks.

Conclusions. In this large, population-based study, obesity and diabetes were independently associated with adverse pregnancy outcomes, highlighting the need for women to undergo lifestyle changes to help them control their weight during the childbearing years and beyond.

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