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Occupational physical activity and renal cell cancer : a nationwide cohort study in Sweden
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- Bergström, A. (author)
- Karolinska Institutet
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- Moradi, T. (author)
- Karolinska Institutet
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- Lindblad, Per, 1953- (author)
- Department of Medical Epidemiology, Karolinska Institutet, Stockholm, Sweden; Department of Urology, Sundsvall Hospital, Sundsvall, Sweden
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- New York, USA : John Wiley & Sons, 1999
- 1999
- English.
- In: International Journal of Cancer. - New York, USA : John Wiley & Sons. - 0020-7136 .- 1097-0215. ; 83:2, s. 186-91
- Journal article (peer-reviewed)
Abstract
Subject headings
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- The causes of renal cell cancer remain incompletely understood. In one previous retrospective case-control study, high occupational physical activity has been associated with a decreased risk among men, but not among women. Our aim was to investigate the association between occupational physical activity and renal cell cancer in a large cohort in Sweden. A cohort of Swedish men and women was identified in the nationwide censuses in 1960 and 1970, and the reported occupations were classified into 4 levels of physical demands. Follow-up from 1971 through 1989 was accomplished through record linkages to the Swedish Cancer Registry. Multivariate Poisson regression models were used to estimate relative risk (RR) and 95% confidence intervals (CI). We found a monotonic increase in risk of renal cell cancer with decreasing level of occupational physical activity among men (p for trend <0.001). After adjustment for socio-economic status, place of residence, and calendar year of follow-up, men with long-term sedentary jobs had a 25% (RR = 1.25, 95% CI 1.02-1.53) increased risk compared to men with physically demanding occupations. Among women there was no association, the dose-risk trend was not significant (p for trend >0.50). Occupational physical activity was inversely associated with renal cell cancer among men. The absence of association among women might be due to smaller range of exposure, confounding by household work or reproductive factors, or to a difference in biological response to physical activity in men and women.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Cancer och onkologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Cancer and Oncology (hsv//eng)
Keyword
- Adult
- Aged
- Aged
- 80 and over
- Carcinoma
- Renal Cell/*epidemiology
- Cohort Studies
- Female
- Humans
- Kidney Neoplasms/*epidemiology
- Male
- Middle Aged
- Occupational Diseases/*epidemiology
- *Physical Exertion
- Poisson Distribution
- Risk Factors
- Sweden/epidemiology
Publication and Content Type
- ref (subject category)
- art (subject category)
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