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Breast cancer risk and night shift work in a case–control study in a Spanish population
Breast cancer risk linked to night shift work in a study of Spanish adults
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Abstract
Working permanent or rotating night shifts is associated with a 1.18 increased risk for breast cancer compared to day workers.
- Chronotype may influence the association between night shift work and breast cancer risk.
- The risk is notably higher for women with invasive tumors, with an odds ratio of 1.23.
- For premenopausal women, night shift work is associated with a 1.44 odds ratio for estrogen and progesterone positive tumors.
- Findings suggest that night work could have varying impacts based on individual hormonal characteristics.
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