Night work
Intervention1 paper3 findings
C · W · M · H: cells, worms or flies, mice, humans. Dark: independent labs found the same change there. Light: one lab or one study. Outline: nothing yet.
Labs are independent when their papers share no last author and no institution.
Against: findings that point the other way from most findings on the same outcome.
No results posted: trials that ended more than a year ago with no results on ClinicalTrials.gov and no paper in ARN’s record.
Company ties: findings with an author at a company, or from a paper that declares the maker’s interest.
Funders: Conselho Nacional de Desenvolvimento Científico e Tecnológico and 1 more
- Humans1
Outcomes
1Breast cancer
no changein humans1HR 0.89
1 study
Breast cancer
no changein humans1HR 0.89
Night work has no effect on breast cancer in humans (HR = 0.89; 95% CI 0.65-1.22).
Humans>10 years
Night work and cancer risk: results from the ELSA-Brasil worker cohort · Revista de saude publica · 11 Sep 2026
Associations
2Colorectal cancer
upin humans1HR 1.35
1 study
Colorectal cancer
upin humans1HR 1.35
Night work raises the risk of colorectal cancer in humans (HR = 1.35; 95% CI 1.09-1.68).
Humans>10 years
Night work and cancer risk: results from the ELSA-Brasil worker cohort · Revista de saude publica · 11 Sep 2026
Prostate cancer
upin humans1HR 1.38
1 study
Prostate cancer
upin humans1HR 1.38
Night work raises the risk of prostate cancer in humans (HR = 1.38; 95% CI 1.09-1.75).
Humans>10 years
Night work and cancer risk: results from the ELSA-Brasil worker cohort · Revista de saude publica · 11 Sep 2026