In the U.S., black infants are 2.4 times as likely to die as white infants, and are more likely to experience adverse birth outcomes that contribute to morbidity and mortality. Black women are also more likely than whites to be obese at conception and to gain outside the Institute of Medicine (IOM) recommended gestational weight gain ranges. Pregravid obesity dramatically increases risk of poor birth outcomes, but these effects may be lessened by appropriate weight gain. Unfortunately, the 2009 Institute of Medicine Committee to Reevaluate Pregnancy Weight Gain Guidelines was unable to answer some of the most important questions about optimal gestational weight gain because of a lack of research data. Our project seeks to address his urgent need. We propose to test the hypotheses that optimal gestational weight gain declines as prepregnancy BMI increases, and that BMI and weight gain are contributors to the black-white disparity in infant mortality and adverse birth outcomes. Our study design will employ existing Pennsylvania vital records (2003-2008) reflecting 751,000 births to black and white mothers. This project seeks to explore separately for black and white women in each BMI category the range of total weight gain that is associated with optimal outcomes and balances risks of low and high weight gain in this population. The project also will determine the contribution of prepregnancy BMI and pregnancy weight gain to the black-white disparity in adverse pregnancy and infant outcomes (preterm birth;small-for-gestational age birth;large-for-gestational age birth;unplanned Cesarean delivery;and infant mortality). The successful completion of these Aims will answer an important question: How do maternal pregravid weight and weight gain during pregnancy-two potentially modifiable factors-contribute to the racial disparity observed in infant mortality rates and adverse birth outcomes? Our use of vital records data leverages an untapped resource to explore a research question of major public health importance. Importantly, this study also seeks to inform the contentious debate regarding ideal gestational weight gain in severely obese women. It will explicitly examine the safety of no weight gain or weight loss during pregnancy for the infant.

Public Health Relevance

This project is significant because the racial disparity in infant mortality and the epidemic of obesity in the U.S. are among the most fundamental problems in public health today. This research could spark confirmatory research and development of interventions that ultimately reduce such health disparities. In addressing some of the most urgent research recommendations from the 2009 Institute of Medicine Committee to Reevaluate Pregnancy Weight Gain Guidelines, this project seeks to inform the development of evidence-based gestational weight gain guidelines for all women and within racial/ethnic groups.

Agency
National Institute of Health (NIH)
Institute
Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD)
Type
Exploratory/Developmental Grants (R21)
Project #
5R21HD065807-02
Application #
8265627
Study Section
Infectious Diseases, Reproductive Health, Asthma and Pulmonary Conditions Study Section (IRAP)
Program Officer
Willinger, Marian
Project Start
2011-06-01
Project End
2013-05-31
Budget Start
2012-06-01
Budget End
2013-05-31
Support Year
2
Fiscal Year
2012
Total Cost
$190,055
Indirect Cost
$46,474
Name
University of Pittsburgh
Department
Public Health & Prev Medicine
Type
Schools of Public Health
DUNS #
004514360
City
Pittsburgh
State
PA
Country
United States
Zip Code
15213
Mendez, Dara D; Doebler, Donna Almario; Kim, Kevin H et al. (2014) Neighborhood socioeconomic disadvantage and gestational weight gain and loss. Matern Child Health J 18:1095-103
Nohr, Ellen A; Olsen, Jorn; Bech, Bodil H et al. (2014) Periconceptional intake of vitamins and fetal death: a cohort study on multivitamins and folate. Int J Epidemiol 43:174-84
Lash, Timothy L; Abrams, Barbara; Bodnar, Lisa M (2014) Comparison of bias analysis strategies applied to a large data set. Epidemiology 25:576-82
Bodnar, Lisa M; Abrams, Barbara; Bertolet, Marnie et al. (2014) Validity of birth certificate-derived maternal weight data. Paediatr Perinat Epidemiol 28:203-12
McClure, Candace K; Catov, Janet M; Ness, Roberta et al. (2013) Associations between gestational weight gain and BMI, abdominal adiposity, and traditional measures of cardiometabolic risk in mothers 8 y postpartum. Am J Clin Nutr 98:1218-25