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Abstract
Working rotating night shifts for 15 or more years may increase the risk of colorectal cancer in women.
- 602 cases of colorectal cancer were documented among 78,586 women.
- Participants were followed from 1988 through 1998.
- Women working 1-14 years of rotating night shifts had a relative risk of 1.00 for colorectal cancer.
- Those working 15 years or more on rotating night shifts had a relative risk of 1.35.
- A statistically significant trend (P(trend) = .04) was observed in the risk associated with night shift duration.
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