Details:

Alternative Title:
Epidemiology
Publisher's site:
http://dx.doi.org/10.1097/EDE.0b013e3182130016
Personal Author:
Lawson, Christina C. ; Whelan, Elizabeth A. ; Lividoti Hibert, Eileen N. ; Spiegelman, Donna ; Schernhammer, Eva S. ; ... More +
Lawson, Christina C. ; Whelan, Elizabeth A. ; Lividoti Hibert, Eileen N. ; Spiegelman, Donna ; Schernhammer, Eva S. ; Rich-Edwards, Janet W. ; Less -
Description:
Background Shift workers who experience sleep disturbances and exposure to light at night could be at increased risk for alterations in physiologic functions that are circadian in nature. Methods We investigated rotating shift work and menstrual cycle patterns in the Nurses’ Health Study II using cross-sectional data collected in 1993 from 71,077 nurses aged 28–45 years who were having menstrual periods and were not using oral contraceptives. Log binomial regression was used to estimate relative risks (RRs) and 95% confidence intervals (CIs). Results Eight percent of participants reported working rotating night shifts for 1–9 months, 4% for 10–19 months, and 7% for 20+ months during the previous two years. Irregular cycles (>7 days variability) were reported by 10% of participants. Seventy percent of women reported menstrual cycles of 26–31 days, 1% less than 21 days, 16% 21–25 days, 11% 32–39 days, and 1% 40+ days. Women with 20+ months of rotating shift work were more likely to have irregular cycles (adjusted RR = 1.23 [CI = 1.14–1.33]); They were also more likely to have cycle length <21 days (1.27 [0.99–1.62]) or 40+ days (1.49 [1.19–1.87]) (both compared with 26–31 days). For irregular patterns and for 40+ day cycles, there was evidence of a dose response with increasing months of rotating shift work. Moderately short (21–25 days) or long (32–39 days) cycle lengths were not associated with rotating shift work. Conclusion Shift work was modestly associated with menstrual function, with possible implications for fertility and other cycle-related aspects of women’s health.
Subject:
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Adaptation, Physiological
Adult
Age Factors
Article
Chronobiology Disorders
Confidence Intervals
Cross-Sectional Studies
Female
Humans
Incidence
Linear Models
Menstrual Cycle
Menstruation Disturbances
Middle Aged
Multivariate Analysis
Nurses
Prognosis
Risk Assessment
Surveys And Questionnaires
Work Schedule Tolerance

Source:
Epidemiology. 22(3):305-312.
Pubmed ID:
21364464
Pubmed Central ID:
PMC5303197
Document Type:
Journal Article ;
Funding:
R01 OH009803/OH/NIOSH CDC HHS/United States ; 200-2001-08007/PHS HHS/United States ;
R01 OH009803/OH/NIOSH CDC HHS/United States ; 200-2001-08007/PHS HHS/United States ; Less -
Collection(s):
CDC Public Access
Main Document Checksum:
[+]
urn:sha256:c975b8ab2302c627bd257435b5a9f49fcfb0f71843489e20239680c0f84dab58
File Type:

Supporting Files

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