American Journal of Epidemiology Vol. 122, No. 3: 357-365
Copyright © 1985 by The Johns Hopkins University School of Hygiene and Public Health
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LIFETIME OCCUPATIONAL EXERCISE AND COLON CANCER
1Department of Social and Preventive Medicine, State University of New York at Buffalo, School of Medicine 2211 Main St., Bldg. A., Buffalo, NY 14214
2Faculty of Engineering and Applied Sciences, State University of New York at Buffalo Buffalo, NY
3Department of Medicine, State University of New York at Buffalo, School of Medicine Buffalo, NY
Send reprint requests to Dr. John E. Vena at this address
The authors used data on patients aged 30–79 years admitted to the Roawell Park Memorial Institute in Buffalo, New York, 1957–1965, to compare the amount of lifetime occupational physical activity for 210 white male patients with cancer of the colon and 276 white male patients with cancer of the rectum to the lifetime occupational physical exercise of 1,431 patients with nonneoplastic nondigestive diseases. The authors found that risk of cancer of the colon increased with increasing amount and proportion of time in jobs involving only sedentary or light work. This relationship was not found for rectal cancer. These findings corroborate those of Garabrant et al. (Am J Epktomlol 1984; 119:1005–14). The strength of the associations presented here and the dose-response relationship indicate that limited physical activity could be an important etiologic factor. More inquiries need to be undertaken to study exercise in relation to other factors, such as diet, in colon cancer risk.
exercise; physical; exertion; colonic neoplasms; occupations
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