ArticleJournal of occupational health2020
Frequency of night shift and menstrual cycle characteristics in Japanese nurses working under two or three rotating shifts.
Article in Journal of occupational health, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
15 citing papers in PubMed, 1 synthesis or guideline pooled it, 35 citations in OpenAlex.
- Association of psychosocial factors at work with fertility and menstrual disorders: A systematic review.Japan journal of nursing science : JJNS · 2025Pooled it
- Association between night-shift frequency and metabolic syndrome among healthcare workers: a moderated mediation analysis of occupational stress and sleep quality.Frontiers in public health · 2026Article
- Association between shift/night work and irregular periods and period pain among two cohorts of Australian women 16 years apart: findings from the Australian longitudinal study on women's health.International archives of occupational and environmental health · 2025Article
- Effectiveness of Interventions to Improve Cardiovascular Perturbations in Women with Exercise-Associated Amenorrhea: A Systematic Review.Women's health reports (New Rochelle, N.Y.) · 2025Review
- Artificial Intelligence in Nursing: Technological Benefits to Nurse's Mental Health and Patient Care Quality.Healthcare (Basel, Switzerland) · 2024Review
- Examining symptom and quality of life in polycystic ovarian syndrome: a web-based cross-sectional study.Future science OA · 2024Article
- Association Between Shift Work and Clean Room Environment on Self-reported Premenstrual Symptoms and Menstrual Pain in Taiwan.Safety and health at work · 2024Article
- Influence of chronotype on sleep quality and menstrual regularity in nurses on monthly shift rotations.Journal of occupational health · 2024Article
- Shift work and menstruation: A meta-analysis study.SSM - population health · 2023Review
- Development and validation of risk prediction model for premenstrual syndrome in nurses: results from the nurses-based the TARGET cohort study.Frontiers in public health · 2023Article
- Effects of Electrocardiographic Monitoring Education on Nurses' Confidence and Psychological Stress: An Online Cross-Sectional Survey in Japan.International journal of environmental research and public health · 2022Article
- Gynecologic problems and healthcare behavior by shift patterns in Korean nursing staff.PloS one · 2022Article
- Menstrual cycle length and modern living: a review.Current opinion in endocrinology, diabetes, and obesity · 2021Review
- Frequency of night shift and menstrual cycle characteristics in Japanese nurses working under two or three rotating shifts.Journal of occupational health · 2020Article
- The Strategies to Improve Healthcare Provider - Focus on Nurses.Gynecology and minimally invasive therapyReview
Corrections and comments
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Authors and funding
6 authors at 4 institutions in 1 country.
Funding
Abstract
objectivesIn Japan, the prevalence of irregular menstrual cycles and its association with the frequency of night shifts have scarcely assessed. The present study aimed to evaluate the relationship between irregular menstrual cycles and the frequency of night shifts in Japanese female nurses.
methodsWe conducted a cross-sectional web-based self-administered questionnaire survey in 2019. An irregular menstrual cycle was defined as a cycle length of ≤21 days or ≥39 days at least a few times over the past year or amenorrhea for at least 3 months. We used Poison regression analysis with a robust error variance to calculate the prevalence ratios adjusted for age, body mass index, hospital size, and the department in which they worked.
resultsA total of 1249 women were included, and 679 (54.4%) and 195 (15.6%) of them worked under two and three rotating shifts. The prevalence of irregular menstrual cycles was 24.8%, 37.4%, and 35.9% in the no night, two rotating, and three rotating shifts groups, respectively. While the frequency of night shifts had a dose-responsive relationship with irregular menstrual cycles in the two rotating shifts group, it was not observed in the three rotating shifts group. However, the risk of work getting affected by dysmenorrhea or premenstrual symptoms increased in the three rotating shifts group.
conclusionsOver 30% of Japanese female nurses working under night shifts had irregular menstrual cycles. The high frequency of night shifts increased the risk of irregular menstrual cycles and secondary amenorrhea in the two rotating shifts group.
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Registered trials
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