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Maternal obesity in early pregnancy and risk of spontaneous and elective preterm deliveries: A retrospective cohort study

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  • Smith, G.C.S.
  • Shah, I.
  • Pell, J.P.
  • Crossley, J.A.
  • Dobbie, R.

Abstract

Objectives. We sought to determine the association between maternal body mass index and risk of preterm delivery. Methods. We assessed 187 290 women in Scotland and estimated adjusted odds ratios for spontaneous and elective preterm deliveries among overweight, obese, and morbidly obese women relative to normal-weight women. Results. Among nulliparous women, the risk of requiring an elective preterm delivery increased with increasing BMI, whereas the risk of spontaneous preterm labor decreased. Morbidly obese nulliparous women were at increased risk of all-cause preterm deliveries, neonatal death, and delivery of an infant weighing less than 1000 g who survived to 1 year of age (a proxy for severe long-term disability). By contrast, obesity and elective preterm delivery were only weakly associated among multiparous women. Conclusions. Obese nulliparous women are at increased risk of elective preterm deliveries. This in turn leads to an increased risk of perinatal mortality and is likely to lead to increased risks of long-term disability among surviving offspring.

Suggested Citation

  • Smith, G.C.S. & Shah, I. & Pell, J.P. & Crossley, J.A. & Dobbie, R., 2007. "Maternal obesity in early pregnancy and risk of spontaneous and elective preterm deliveries: A retrospective cohort study," American Journal of Public Health, American Public Health Association, vol. 97(1), pages 157-162.
    • Handle: RePEc:aph:ajpbhl:10.2105/ajph.2005.074294_4
    DOI: 10.2105/AJPH.2005.074294
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    1. Katharina Syböck & Beda Hartmann & Sylvia Kirchengast, 2023. "Maternal Prepregnancy Obesity Affects Foetal Growth, Birth Outcome, Mode of Delivery, and Miscarriage Rate in Austrian Women," IJERPH, MDPI, vol. 20(5), pages 1-13, February.
    2. Cezary Wojtyla & Pawel Stanirowski & Pawel Gutaj & Michal Ciebiera & Andrzej Wojtyla, 2021. "Perinatal Outcomes in a Population of Diabetic and Obese Pregnant Women—The Results of the Polish National Survey," IJERPH, MDPI, vol. 18(2), pages 1-14, January.
    3. Clayborne, Zahra M. & Giesbrecht, Gerald F. & Bell, Rhonda C. & Tomfohr-Madsen, Lianne M., 2017. "Relations between neighbourhood socioeconomic status and birth outcomes are mediated by maternal weight," Social Science & Medicine, Elsevier, vol. 175(C), pages 143-151.
    4. Kritsotakis, George & Vassilaki, Maria & Chatzi, Leda & Georgiou, Vaggelis & Philalithis, Anastassios E. & Kogevinas, Manolis & Koutis, Antonis, 2011. "Maternal social capital and birth outcomes in the mother–child cohort in Crete, Greece (Rhea study)," Social Science & Medicine, Elsevier, vol. 73(11), pages 1653-1660.

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