ArticleInternational journal of environmental research and public health2021
How the Intensity of Night Shift Work Affects Breast Cancer Risk.
Article in International journal of environmental research and public health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 2 of them syntheses that pooled it.
What it found
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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.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
12 citing papers in PubMed, 2 syntheses or guidelines pooled it, 24 citations in OpenAlex.
- Night shift work and female breast cancer: a two-stage dose-response meta-analysis for the correct risk definition.BMC public health · 2024Pooled it
- Prolonged exposure to artificial light and carcinogenesis: A systematic review of oncostatic mechanisms associated with melatonin pathways.Photochemistry and photobiologyPooled it
- Night shift work and breast cancer: from etiopathology to precision risk analysis.NPJ breast cancer · 2025Review
- Chrono-Pharmacology for Cancer: Harnessing Circadian Regulations of the Cell Cycle and Immune Response Dynamics for Precision Therapy.ACS pharmacology & translational science · 2025Review
- Article
- Molecular Subtypes and Mechanisms of Breast Cancer: Precision Medicine Approaches for Targeted Therapies.Cancers · 2025Review
- Night shift work and breast cancer risk - 2023 update of epidemiologic evidence.Journal of the National Cancer Center · 2025Review
- The Relationship between Circadian Rhythm and Cancer Disease.International journal of molecular sciences · 2024Review
- Digital Screen Time and the Risk of Female Breast Cancer: A Retrospective Matched Case-Control Study.Journal of biomedical physics & engineering · 2024Article
- Night work and breast cancer risk in a cohort of female healthcare employees in Stockholm, Sweden.Occupational and environmental medicine · 2023Article
- Article
- The relationship between night shift work and breast cancer incidence: A systematic review and meta-analysis of observational studies.Open medicine (Warsaw, Poland) · 2022Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background-In 2019, the IARC concluded that "night shift work is probably carcinogenic to humans (Group 2A), based on limited evidence from human epidemiological studies and sufficient evidence of cancer and strong mechanistic evidence in experimental Animals." The negative health consequences of night shift work may depend on how the night shifts are scheduled. The aim of this study was to investigate how the characteristics of night work affect the risk of developing breast cancer. Methods-A case-control study was conducted in 2015-2019 in the Lodz region. The case group included 494 women with breast cancer, while the control group included 515 healthy women. Results-Night work was found to be the third most important factor regarding breast cancer after a high BMI and a short or no breastfeeding period and before factors such as early menstruation, late menopause, no pregnancy, and smoking. The harmful effects of night work were influenced by its intensity, frequency, rotation, and the number of night shift years worked. Night work increases the breast cancer risk by 2.34 times, and high-intensity night work increases the breast cancer risk by 2.66 times. Conclusions-Appropriate ergonomic recommendations for night shift work for employers should be considered.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.