Occupational and leisure-time physical activity and risk of colon cancer by subsite

Journal of Occupational and Environmental Medicine
Yawei ZhangTongzhang Zheng

Abstract

Studies of physical activity and colon cancer risk by anatomic site have provided inconsistent results. We analyzed data from a population-based case-control study conducted in Iowa involving 685 colon cancer cases and 2434 control subjects. Among those who reported recreational activity more than twice per week, a 30% risk reduction of colon cancer was observed for all sites with a 40% risk reduction for cancer of the right colon. Occupational physical activity was also associated with a reduced risk of colon cancer. The risk was the lowest for those with both high occupational and recreational physical activity (odds ratio, 0.5; 95% confidence interval, 0.3-0.8). Increased physical activity was inversely associated with colon cancer risk. The inverse associations were stronger for the right than for the left colon.

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Aug 24, 2012·Journal of the National Cancer Institute·Terry BoyleLin Fritschi
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