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First-trimester working conditions and birthweight: A prospective cohort study

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  • Vrijkotte, T.G.M.
  • Van Der Wal, M.F.
  • Van Eijsden, M.
  • Bonsel, G.J.

Abstract

Objectives. We investigated the relationship between women's first-trimester working conditions and infant birthweight. Methods. Pregnant women (N=8266) participating in the Amsterdam Born Children and Their Development study completed a questionnaire gathering information on employment and working conditions. After exclusions, 7135 women remained in our analyses. Low birthweight and delivery of a small-for-gestational-age (SGA) infant were the main outcome measures. Results. After adjustment, a workweek of 32 hours or more (mean birthweight decrease of 43 g) and high job strain (mean birthweight decrease of 72 g) were significantly associated with birthweight. Only high job strain increased the risk of delivering an SGA infant (odds ratio [OR]=1.5; 95% confidence interval [CI]=1.1, 2.2). After adjustment, the combination of high job strain and a long workweek resulted in the largest birthweight reduction (150 g) and the highest risk of delivering an SGA infant (OR=2.0; 95% CI=1.2, 3.2). Conclusions. High levels of job strain during early pregnancy are associated with reduced birthweight and an increased risk of delivering an SGA infant, particularly if mothers work 32 or more hours per week.

Suggested Citation

  • Vrijkotte, T.G.M. & Van Der Wal, M.F. & Van Eijsden, M. & Bonsel, G.J., 2009. "First-trimester working conditions and birthweight: A prospective cohort study," American Journal of Public Health, American Public Health Association, vol. 99(8), pages 1409-1416.
    • Handle: RePEc:aph:ajpbhl:10.2105/ajph.2008.138412_1
    DOI: 10.2105/AJPH.2008.138412
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    1. Camilla Sandal Sejbaek & Hans Bay & Ann Dyreborg Larsen & Petter Kristensen & Vivi Schlünssen & Anne-Marie Nybo Andersen & Jens Peter Bonde & Mette Juhl & Karin Sørig Hougaard, 2018. "Combined exposure to lifting and psychosocial strain at work and adverse pregnancy outcomes—A study in the Danish National Birth Cohort," PLOS ONE, Public Library of Science, vol. 13(9), pages 1-15, September.
    2. Kien Le & My Nguyen, 2021. "The Impacts of Temperature Shocks on Birth Weight in Vietnam," Population and Development Review, The Population Council, Inc., vol. 47(4), pages 1025-1047, December.
    3. Shirlee Lichtman-Sadot & Neta Benshalom-Tirosh & Eyal Sheiner, 2020. "Conflict, Rockets, and Birth Outcomes: Evidence from Israel’s Operation Protective Edge," Working Papers 2009, Ben-Gurion University of the Negev, Department of Economics.
    4. Lichtman-Sadot, Shirlee & Benshalom-Tirosh, Neta & Sheiner, Eyal, 2020. "Conflict, Rockets, and Birth Outcomes: Evidence from Israel's Operation Protective Edge," IZA Discussion Papers 13394, Institute of Labor Economics (IZA).

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