Occupational work hazards affect pregnancy outcomes

  • Am J Obstet Gynecol

  • International Clinical Digest
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Takeaway

  • Heavy lifting and prolonged standing are associated with preterm delivery and preeclampsia.

Why this matters

  • Occupational safety guidelines, based on scientific evidence, during pregnancy are needed.

Key results

  • Neonatal outcomes
    • Heavy lifting:
      • Lifting >11 kg per time was associated with increased risk for miscarriage (OR, 1.31; 95% CI, 1.08-1.58).
      • Lifting ≥100 kg per day was associated with increased risk for preterm delivery (OR, 1.31; 95% CI, 1.11-1.56).
    • Prolonged standing or walking (≥4 hours per day):
      • Associated with increased risk for preterm delivery (OR, 1.11; 95% CI, 1.02-1.22).
    • Heavy workload:
      • Associated with increased risk for preterm delivery (OR, 1.23; 95% CI, 1.07-1.41).
  • Maternal outcomes
    • Heavy lifting:
      • Lifting >11 kg per time (OR, 1.35; 95% CI, 1.07-1.71) and ≥100 kg per day (OR, 1.65; 95% CI, 1.31-2.09) was associated with increased risk for preeclampsia. 

Study design

  • Systematic review and meta-analysis.
  • 80 studies with 853,149 women from 30 countries were included in the analysis.
  • Clinical outcomes included preterm delivery (
  • Funding: Government of Alberta Occupational Health and Safety Futures Research Grant.

Limitations

  • Limitations related to limitations of original studies.
  • Some evidence was not of high grade.

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