Occupation,physical activity,and risk of prostate cancer in Shanghai,People's Republic of China |
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Authors: | Drs Ann W. Hsing Joseph K. McLaughlin Dr Wei Zheng Dr Yu-Tang Gao William J. Blot |
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Affiliation: | (1) Division of Cancer Etiology, Epidemiology and Biostatistics Program, the National Cancer Institute, EPN 415, 6130 Executive Blvd., 20892 Bethesda, MD, USA;(2) Department of Epidemiology, University of Minnesota, Minneapolis, MN, USA;(3) the Shanghai Cancer Institute, Shanghai, PR China |
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Abstract: | Based on occupational data for all (n=264) prostate cancer cases diagnosed during 1980–84 in urban Shanghai and on employment information from the 1982 census, standardized incidence ratios (SIR) were calculated for occupational groups classified by job type and physical activity level. White-collar workers (professionals, government officials, clerical workers, salespersons) had an elevated incidence of prostate cancer, although the excesses were not significant. In addition, when jobs were classified by time spent sitting or energy expenditure, men employed in occupations with low physical activity levels tended to have moderately elevated risks of prostate cancer. Findings from this study in an area with one of the world's lowest incidence rates of prostate cancer add to the accumulating evidence that jobs with a low level of physical activity are associated with an increased prostate-cancer risk. |
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Keywords: | Occupation People's Republic of China physical activity prostate cancer |
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