Physical exertion at work and the risk of preterm delivery and small-for-gestational-age birth

To assess whether exposure to standing, lifting, night work, or long work hours during 3 periods of pregnancy are associated with an increased risk of preterm or small-for-gestational-age birth. The Pregnancy, Infection and Nutrition study is a prospective cohort with a nested case-control component...

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Vydané v:Obstetrics and gynecology (New York. 1953) Ročník 106; číslo 6; s. 1279
Hlavní autori: Pompeii, Lisa A, Savitz, David A, Evenson, Kelly R, Rogers, Bonnie, McMahon, Michael
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: United States 01.12.2005
Predmet:
Adult
Age Distribution
Case-Control Studies
Cohort Studies
Confidence Intervals
Female
Follow-Up Studies
Gestational Age
Humans
Incidence
Infant, Newborn
Infant, Premature
Infant, Small for Gestational Age
Maternal Age
Obstetric Labor, Premature - epidemiology
Obstetric Labor, Premature - etiology
Odds Ratio
Physical Exertion
Pregnancy
Probability
Prospective Studies
Risk Assessment
Women, Working
Work Schedule Tolerance
ISSN:0029-7844
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Popis
Shrnutí:To assess whether exposure to standing, lifting, night work, or long work hours during 3 periods of pregnancy are associated with an increased risk of preterm or small-for-gestational-age birth. The Pregnancy, Infection and Nutrition study is a prospective cohort with a nested case-control component that was conducted through clinic and hospital settings in Central North Carolina. A total of 1,908 women pregnant with a singleton gestation were recruited during prenatal visits from January 1995 through April 2000 and provided information during telephone and face-to-face interviews about physical exertion for the 2 longest-held jobs during pregnancy. No significant elevations in preterm delivery were observed among women who lifted repeatedly or stood at least 30 hours per week, with no changes in risk estimates over the course of pregnancy. A 50% elevation in the risk of preterm delivery (relative risk 1.5, 95% confidence interval 1.0-2.0; first trimester) was observed among women who reported working at night (10:00 PM to 7:00 AM), whereas a 40% reduction in risk was observed among women working at least 46 hours per week (relative risk 0.6, 95% confidence interval 0.4-0.9; first trimester), regardless of period of exposure. No elevations in small-for-gestational-age birth were observed among women exposed to any of the 4 types of occupational exertion. Physically demanding work does not seem to be associated with adverse pregnancy outcomes, whereas working at night during pregnancy may increase the risk of preterm delivery. Studies to examine the effect of shift work on uterine activity would help to clarify the possibility of a causal effect on preterm birth.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:0029-7844
DOI:10.1097/01.aog.0000189080.76998.f8