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0339 Occupation and risk of prostate cancer in a national population-based cohort study: the canadian census health and environment cohort
  1. Jeavana Sritharan1,2,
  2. Jill MacLeod1,
  3. Shelley Harris1,3,
  4. Donald Cole3,
  5. Anne Harris1,4,
  6. Michael Tjepkema5,
  7. Paul Peters6,
  8. Paul Demers1,3
  1. 1Occupational Cancer Research Centre, Cancer Care Ontario, Toronto, Ontario, Canada
  2. 2Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
  3. 3Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
  4. 4School of Occupational and Public Health, Ryerson University, Toronto, Ontario, Canada
  5. 5Health Analysis Division, Statistics Canada, Ottawa, Ontario, Canada
  6. 6Department of Sociology and Economics, University of New Brunswick, Fredericton, New Brunswick, Canada


Prostate cancer is one of the most commonly diagnosed cancers in men and further evidence is needed on preventable risk factors. This study investigated the relationship between prostate cancer risk and occupation using a large Canadian cohort.

The Canadian Census Health and Environment Cohort was established by linking the 1991 Canadian Census Cohort to the Canadian Cancer Database (1969–2010), Canadian Mortality Database (1991–2011) and the Tax Summary Files (1981–2011). A total of 37 695 prostate cancer cases were identified based on age at diagnosis. Cox proportional hazards models were used to estimate hazards ratios (HR) and 95% confidence intervals (CI).

Overall, age standardised prostate cancer rates were observed to be highest in white collar workers and lowest in construction/transportation workers. In men aged 50–74 years, elevated risks were observed in agriculture management (HR=1.11, 95% CI 1.06–1.17), farm work (HR=1.12, 95% CI 1.02–1.23), firefighting (HR=1.16, 95% CI 1.00–1.35), military (HR=1.14, 95% CI 1.00–1.32), police (HR=1.28, 95% CI 1.14–1.42), senior management (HR=1.09, 95% CI 1.02–1.17), office (HR=1.16, 95% CI 1.08–1.24), and finance (HR=1.08, 95% CI 1.03–1.13). Similar findings were observed in men aged 25–49 years, with additional elevated risks in office management (HR=1.19, 95% CI 1.11–1.27) and education (HR=1.05, 95% CI 1.00–1.11). Decreased risks were observed in construction and transportation occupations in both age groups.

Findings across agriculture and protective services were consistent with previous studies. Some findings, particularly among management occupations, may be due to screening. Further investigation is needed on job-specific exposures with better understanding on differences in rates across occupations.

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