• Am J Prev Med · May 2022

    Racial Inequities in Birth Weight by Maternal Age Among College-Educated Mothers: The Role of Early Disadvantage.

    • Stephanie M Koning, Jessica A Polos, Kiarri N Kershaw, and Thomas W McDade.
    • Institute for Policy Research, Northwestern University, Evanston, Illinois; Department of Anthropology, Weinberg College of Arts & Sciences, Northwestern University, Evanston, Illinois. Electronic address: stephanie.koning@northwestern.edu.
    • Am J Prev Med. 2022 May 1; 62 (5): 735744735-744.

    IntroductionNon-Hispanic Black infants experience disproportionately high risks of low birth weight compared with non-Hispanic White infants, particularly among mothers with high educational attainment and greater socioeconomic advantage. This study investigates how maternal early-life disadvantage contributes to ongoing racial birth weight inequities among U.S. college‒educated mothers, specifically declining birth weights with age among non-Hispanic Black mothers.MethodsStudy analyses used cohort data from the National Longitudinal Study of Adolescent to Adult Health. Racial inequities in birth weight by maternal age and early-life disadvantage were assessed using completed reproductive histories among college-educated mothers at ages 33-44 years collected in 2016‒2018 and regression-based marginal standardization techniques. Early-life disadvantage was measured using a study-based composite measure of early-life concentrated poverty and social disadvantage in homes, neighborhoods, and schools, collected in previous waves. Primary analyses were completed in 2020‒2021.ResultsAmong non-Hispanic Black mothers who experienced high early-life disadvantage, a 1-year increase in maternal age at delivery was associated with lower birth weight by 26.07 g (95% CI= -48.74, -3.40). Similar declines were not found among non-Hispanic Black mothers with low early-life disadvantage. Non-Hispanic White mothers experienced increased birth weight with maternal age, 6.85 g (95% CI= -1.12, 14.82) per year, which did not significantly vary by early-life disadvantage.ConclusionsEarly-life disadvantage modifies whether and how college-educated mothers experience birth weight decline with older age. The effects of early-life contexts and embedded racial inequities on maternal health inequities and differential weathering warrant further public health attention.Copyright © 2022 American Journal of Preventive Medicine. Published by Elsevier Inc. All rights reserved.

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