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Q In pregnant working women, does physical exertion at work (standing, lifting, night work, and long hours) increase the risk of preterm delivery or fetal growth restriction?
METHODS
Design:
prospective cohort study.
Setting:
prenatal clinics at 3 hospitals in North Carolina, USA.
Participants:
1908 English speaking women ⩾16 years of age who were 24–29 weeks pregnant with a singleton gestation and had worked ⩾28 days in the first 2 trimesters of pregnancy.
Risk factors:
physical exertion at work during the first or second trimester, including standing, heavy lifting (>11 kg), regular night work (10 pm to 7 am), and long hours (exposure determined by telephone interview at 24–31 wks gestation).
Outcomes:
preterm delivery (<37 wks gestation) and small for gestational age (SGA) infant (birth weight …
Footnotes
For correspondence: Dr L Pompeii, University of Texas School of Public Health, Houston, TX, USA. lisa.pompeii{at}uth.tmc.edu
Sources of funding: March of Dimes Birth Defects Foundation; National Institute of Child Health and Human Development; Centers for Disease Control and Prevention; American Association of Occupational Health Nurses Foundation.