Meta-Analysis Comparing Menstrual Regularity and Dysmenorrhea of Women Working Rotating Shifts and Fixed Day Shifts

Wen Pei Chang, Yu Pei Chang

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Background: Rotating shift work can cause abnormalities in their endocrine system. We conducted a meta-analysis to gain a better understanding of the differences between women working rotating shifts and fixed day shifts in menstrual regularity and dysmenorrhea. Methods: We searched for studies containing relevant keywords that were published between 1990 and 2019 in the Cochrane Library, EBSCO (including the Cumulative Index to Nursing and Allied Health Literature [CINAHL]), MEDLINE, and ProQuest. Data analysis was performed using the software package Comprehensive Meta-Analysis (CMA) Version 3.0. Results: A total of 14 studies met our selection criteria. The pooled odds ratio (OR) comparing the menstrual irregularity of women working rotating shifts and fixed day shifts was 1.35 (95% confidence interval [CI]: 1.28-1.42, p < 0.001). The pooled OR of the women aged 30 years or older was 1.35 (95% CI: 1.28-1.42, p < 0.001); and for the women under 30 years old, the pooled OR was 1.66 (95% CI: 1.13-2.44, p = 0.010). The pooled OR comparing the dysmenorrhea occurrence among women working rotating shifts and fixed day shifts was 1.51 (95% CI: 0.87-2.62, p = 0.139). The pooled OR of the women aged 30 years or older was 2.35 (95% CI: 1.63-3.39, p < 0.001); and for the women under 30 years old, the pooled OR was 1.20 (95% CI: 0.61-2.33, p = 0.601). Conclusions: The results indicate that regardless of age, women working rotating shifts were more likely to experience menstrual irregularity than those working fixed day shifts. With regard to dysmenorrhea, among women aged 30 years or older, those working rotating shifts were also more likely to experience dysmenorrhea than those working fixed day shifts.

Original languageEnglish
Pages (from-to)722-730
Number of pages9
JournalJournal of Women's Health
Volume30
Issue number5
DOIs
Publication statusPublished - May 2021

Keywords

  • dysmenorrhea
  • fixed day shift
  • menstrual cycles
  • rotating shift

ASJC Scopus subject areas

  • Medicine(all)

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