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.
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.
|MacLehose, Richard F; Bodnar, Lisa M; Meyer, Craig S et al. (2018) Hierarchical Semi-Bayes Methods for Misclassification in Perinatal Epidemiology. Epidemiology 29:183-190|
|Naimi, Ashley I; Schnitzer, Mireille E; Moodie, Erica E M et al. (2016) Mediation Analysis for Health Disparities Research. Am J Epidemiol 184:315-24|
|Lemon, Lara S; Naimi, Ashley I; Abrams, Barbara et al. (2016) Prepregnancy obesity and the racial disparity in infant mortality. Obesity (Silver Spring) 24:2578-2584|
|Bodnar, Lisa M; Pugh, Sarah J; Lash, Timothy L et al. (2016) Low Gestational Weight Gain and Risk of Adverse Perinatal Outcomes in Obese and Severely Obese Women. Epidemiology 27:894-902|
|Bodnar, Lisa M; Abrams, Barbara; Siminerio, Lara et al. (2016) Validity of birth certificate-derived maternal weight data in twin pregnancies. Matern Child Nutr 12:632-8|
|Bodnar, Lisa M; Siminerio, Lara L; Himes, Katherine P et al. (2016) Maternal obesity and gestational weight gain are risk factors for infant death. Obesity (Silver Spring) 24:490-8|
|Lash, Timothy L; Abrams, Barbara; Bodnar, Lisa M (2014) Comparison of bias analysis strategies applied to a large data set. Epidemiology 25:576-82|
|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|
|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|
|Bodnar, Lisa M; Abrams, Barbara; Bertolet, Marnie et al. (2014) Validity of birth certificate-derived maternal weight data. Paediatr Perinat Epidemiol 28:203-12|
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