ArticleOccupational and environmental medicine2023
Night work and breast cancer risk in a cohort of female healthcare employees in Stockholm, Sweden.
Article in Occupational and environmental medicine, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 3 of them syntheses that pooled it.
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Who cites it
15 citing papers in PubMed, 3 syntheses or guidelines pooled it.
- Return to work for health professionals with breast cancer as health recipients: A systematized review.Work (Reading, Mass.) · 2026Pooled it
- Nightshift work and risk of breast and prostate cancer: a systematic review and meta-analysis, 2012-2023.Anales del sistema sanitario de Navarra · 2025Pooled it
- Night shift work and breast cancer risk in healthcare workers: a systematic review and meta-analysis.Occupational medicine (Oxford, England) · 2025Pooled it
- Shift work and medically certified sickness absence due to common mental disorders among nursing staff: a prospective cohort study.European journal of public health · 2026Article
- Night shift work and breast cancer risk: A cohort study based on payroll and survey data from Finland.Scandinavian journal of work, environment & health · 2026Article
- Working time traffic light recommendations: development, use, and implementation in the Finnish social and healthcare.Industrial health · 2026Article
- Night work and cancer risk: results from the ELSA-Brasil worker cohort.Revista de saude publica · 2026Article
- Modifiable and Nonmodifiable Risk Factors for Breast Cancer: A Comprehensive Scoping Review.International journal of breast cancer · 2026Review
- Night shift work and breast cancer: from etiopathology to precision risk analysis.NPJ breast cancer · 2025Review
- Changes in shift patterns due to the COVID-19 pandemic: a prospective cohort study of the intensive care nursing staff in hospitals in Stockholm.International journal of nursing studies advances · 2025Article
- The multifaceted impact of circadian disruption on cancer risk: a systematic review of insights and economic implications.Journal of the National Cancer Center · 2025Review
- Response to Drs. Igor Burstyn and George Luta's letter: Advice on better utilization of validation data to adjust odds ratios for differential exposure misclassification (recall bias).Scandinavian journal of work, environment & health · 2025Article
- Night shift work and breast cancer risk - 2023 update of epidemiologic evidence.Journal of the National Cancer Center · 2025Review
- Working hours and health - key research topics in the past and future.Scandinavian journal of work, environment & health · 2024Review
- Working women's perceptions and expectations of digital health tools for personal health management: A qualitative study.Digital healthArticle
Corrections and comments
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Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesNight work has been classified as probably carcinogenic to humans by the International Agency for Research on Cancer, but epidemiological evidence was considered limited due to variability in findings and potential bias. This study aimed to investigate the risk of breast cancer in a cohort with detailed and registry-based data on night work.
methodsThe cohort comprised 25 585 women (nurses and nursing assistants) employed 1 year or more between 2008 and 2016 in the healthcare sector in Stockholm. Information on work schedules was obtained from employment records. Breast cancer cases were identified from the national cancer register. HRs were estimated by a discrete time proportional hazards model, adjusting for age, country of birth, profession and childbirth.
resultsThere were 299 cases of breast cancer, 147 in premenopausal and 152 in postmenopausal women. The adjusted HR of postmenopausal breast cancer in association with ever versus never working nights was 1.31 (95% CI 0.91 to 1.85). Eight or more years of night work was associated with an increased risk of postmenopausal breast cancer, HR=4.33 (95% CI 1.45 to 10.57), based on five cases only, though.
conclusionsThis study is limited by a short period of follow-up and a lack of information on night work before 2008. Most exposure metrics showed no association with breast cancer risk, but there was an elevated risk of postmenopausal breast cancer in women after 8 or more years of night work.
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