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Canadian Farm Operator Study: methodology.

D A Jordan-Simpson, M E Fair, C Poliquin

    Health Reports
    |January 1, 1990
    PubMed
    Summary
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    Canadian farm operators showed no overall excess mortality. However, pesticide exposure, specifically herbicides, was linked to increased non-Hodgkin

    Area of Science:

    • Occupational Health
    • Epidemiology
    • Environmental Health

    Background:

    • A large-scale mortality study of Canadian male farm operators was initiated.
    • Previous research suggested potential links between pesticide use and cancers in farmers.

    Purpose of the Study:

    • To examine mortality patterns among farm operators.
    • To investigate the association between farm practices, socio-demographic factors, and specific cancers, particularly pesticide exposure and non-Hodgkin's lymphoma.

    Main Methods:

    • Cohort creation using the 1971 Census of Agriculture data for 326,000 Canadian male farm operators.
    • Analysis of mortality patterns in relation to farm practices and socio-demographic variables.
    • Preliminary analysis focused on the Saskatchewan cohort.

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    Main Results:

    • The Saskatchewan cohort experienced no overall excess mortality from any cause, including non-Hodgkin's lymphoma.
    • A significant dose-response relationship was observed between non-Hodgkin's lymphoma risk and the acreage sprayed with herbicides in 1970.
    • Increased risk of non-Hodgkin's lymphoma was also associated with higher spending on farm fuel and oil in 1970.

    Conclusions:

    • While overall mortality was not elevated, specific pesticide exposures (herbicides) and farm expenditures correlate with increased risk of non-Hodgkin's lymphoma.
    • Further regional analyses are pending to provide a comprehensive understanding of farmer mortality.