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Work schedule and physically demanding work in relation to menstrual function: the Nurses' Health Study 3.

Publication ,  Journal Article
Lawson, CC; Johnson, CY; Chavarro, JE; Lividoti Hibert, EN; Whelan, EA; Rocheleau, CM; Grajewski, B; Schernhammer, ES; Rich-Edwards, JW
Published in: Scand J Work Environ Health
March 2015

OBJECTIVES: This study aimed to evaluate occupational exposures and menstrual cycle characteristics among nurses. METHODS: Using cross-sectional data collected in 2010-2012 from 6309 nurses aged 21-45 years, we investigated nurses' menstrual function in the Nurses' Health Study 3. We used multivariable regression modeling to analyze the associations between occupational exposures and prevalence of irregular cycles and long and short cycle lengths. RESULTS: The cohort reported cycle length as <21 (1.5%), 21-25 (15.6%), 26-31 (69.7%), and 32-50 (13.2%) days. In addition, 19% of participants reported irregular cycles. Working ≥41 hours/week was associated with a 16% [95% confidence interval (95% CI): 4-29%] higher prevalence of irregular cycles and a higher prevalence of very short (<21-day) cycles [prevalence odds ratio (OR) 1.93, 95% CI 1.24-3.01] in adjusted models. Irregular menstrual cycles were more prevalent among women working nights only (32% higher; 95% CI 15-51%) or rotating nights (27% higher, 95% CI 10-47%), and was associated with the number of night shifts per month (P for trend <0.0001). Rotating night schedule was associated with long (32-50 day) cycles (OR 1.28, 95% CI 1.03-1.61). Heavy lifting was associated with a higher prevalence of irregular cycles (34% higher), and the prevalence of cycles <21 days and 21-25 day cycles increased with increasing heavy lifting at work (P for trend <0.02 for each endpoint). CONCLUSION: Night work, long hours, and physically demanding work might relate to menstrual disturbances.

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Published In

Scand J Work Environ Health

DOI

EISSN

1795-990X

Publication Date

March 2015

Volume

41

Issue

2

Start / End Page

194 / 203

Location

Finland

Related Subject Headings

  • Young Adult
  • Work Schedule Tolerance
  • Stress, Psychological
  • Occupational Health
  • Occupational Exposure
  • Nursing Staff, Hospital
  • Middle Aged
  • Menstruation Disturbances
  • Menstrual Cycle
  • Humans
 

Citation

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Lawson, C. C., Johnson, C. Y., Chavarro, J. E., Lividoti Hibert, E. N., Whelan, E. A., Rocheleau, C. M., … Rich-Edwards, J. W. (2015). Work schedule and physically demanding work in relation to menstrual function: the Nurses' Health Study 3. Scand J Work Environ Health, 41(2), 194–203. https://doi.org/10.5271/sjweh.3482
Lawson, Christina C., Candice Y. Johnson, Jorge E. Chavarro, Eileen N. Lividoti Hibert, Elizabeth A. Whelan, Carissa M. Rocheleau, Barbara Grajewski, Eva S. Schernhammer, and Janet W. Rich-Edwards. “Work schedule and physically demanding work in relation to menstrual function: the Nurses' Health Study 3.Scand J Work Environ Health 41, no. 2 (March 2015): 194–203. https://doi.org/10.5271/sjweh.3482.
Lawson CC, Johnson CY, Chavarro JE, Lividoti Hibert EN, Whelan EA, Rocheleau CM, et al. Work schedule and physically demanding work in relation to menstrual function: the Nurses' Health Study 3. Scand J Work Environ Health. 2015 Mar;41(2):194–203.
Lawson, Christina C., et al. “Work schedule and physically demanding work in relation to menstrual function: the Nurses' Health Study 3.Scand J Work Environ Health, vol. 41, no. 2, Mar. 2015, pp. 194–203. Pubmed, doi:10.5271/sjweh.3482.
Lawson CC, Johnson CY, Chavarro JE, Lividoti Hibert EN, Whelan EA, Rocheleau CM, Grajewski B, Schernhammer ES, Rich-Edwards JW. Work schedule and physically demanding work in relation to menstrual function: the Nurses' Health Study 3. Scand J Work Environ Health. 2015 Mar;41(2):194–203.

Published In

Scand J Work Environ Health

DOI

EISSN

1795-990X

Publication Date

March 2015

Volume

41

Issue

2

Start / End Page

194 / 203

Location

Finland

Related Subject Headings

  • Young Adult
  • Work Schedule Tolerance
  • Stress, Psychological
  • Occupational Health
  • Occupational Exposure
  • Nursing Staff, Hospital
  • Middle Aged
  • Menstruation Disturbances
  • Menstrual Cycle
  • Humans