Work schedule and physical factors in relation to fecundity in nurses

Details

• Personal Author:
  Chavarro JE ; Gaskins AJ ; Lawson, Christina C. ; Missmer SA ; Rich-Edwards JW ; Schernhammer ES
• Description:
  Objectives: To evaluate the association of work schedule and physical factors with fecundity. Methods: Women currently employed outside the home and trying to get pregnant (n=1739) in the Nurses' Health Study 3 cohort (2010-2014) were included in this analysis. Work schedule and physical labour were self-reported on the baseline questionnaire, and every 6 months thereafter the women reported the duration of their ongoing pregnancy attempt. Multivariable accelerated failure time models were used to estimate time ratios (TR) and 95% CIs. Results: Among the 1739 women (median age=33 years, 93% Caucasian) the estimated proportions of women not pregnant after 12 and 24 months were 16% and 5%, respectively. None of the various shift work patterns were associated with duration of pregnancy attempt (as a surrogate for fecundity). However, women working >40 h/week had a 20% (95% CI 7 to 35%) longer median duration of pregnancy attempt compared to women working 21-40 h/week (p-trend=0.005). Women whose work entailed heavy lifting or moving (ie, 25+ pounds) >15 times/day also had a longer median duration of pregnancy attempt (adjusted TR=1.49; 95% CI 1.20 to 1.85) compared to women who never lifted or moved heavy loads (p-trend=0.002). The association between heavy moving and lifting and duration of pregnancy attempt was more pronounced among overweight or obese women (body mass index, BMI<25: TR=1.17; 95% CI 0.88 to 1.56; BMI >/=25: TR=2.03, 95% CI 1.48 to 2.79; p-interaction=0.007). Conclusions: Working greater than 40 h per week and greater frequency of lifting or moving a heavy load were associated with reduced fecundity in a cohort of nurses planning pregnancy. [Description provided by NIOSH]
• Subjects:
  Body Weight Health Personnel Occupational Health Pregnancy Safety Surveys And Questionnaires Urogenital System Women
• Keywords:
  Body-weight Fertility Health-surveys Humans Manual-lifting Manual-materials-handling Medical-personnel Nurses Physical-stress Physiological-factors Physiological-response Questionnaires Statistical-analysis Work-intervals

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• ISSN:
  1351-0711
• Document Type:
  Text
• Funding:
  Contract
• Genre:
  Journal Article
• Place as Subject:
  Massachusetts ; Ohio ; OSHA Region 1 ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DSHEFS - Division of Surveillance, Hazard Evaluations, and Field Studies
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  72
• Issue:
  11
• NIOSHTIC Number:
  nn:20046565
• Citation:
  Occup Environ Med 2015 Nov; 72(11):777-783
• Contact Point Address:
  Dr Audrey J Gaskins, Department of Nutrition, Harvard T.H. Chan School of Public Health, Building II 3rd Floor, 655 Huntington Avenue, Boston, MA 02115, USA
• Email:
  ajg219@mail.harvard.edu
• Federal Fiscal Year:
  2016
• NORA Priority Area:
  Healthcare and Social Assistance
• Peer Reviewed:
  True
• Source Full Name:
  Occupational and Environmental Medicine
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:4f2406d421cd7bc4ce411f5e8e1818acfb3be6fb7beb7122a749fd2960214681aa75729af59c5d75f41e9a04ee68c000a7e206a42df3493090e188236c1b16ee
• Download URL:
  https://stacks.cdc.gov/view/cdc/201579/cdc_201579_DS1.pdf
• File Type:
  [PDF - 346.34 KB ]