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Related Experiment Videos

Methods of cancer case selection: implications for research.

A F Saftlas, W A Satariano, G M Swanson

    American Journal of Epidemiology
    |December 1, 1983
    PubMed
    Summary

    Cancer diagnosis methods impact age findings. Microscopically confirmed cases are younger than clinically diagnosed ones, affecting cancer risk factor studies.

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    Area of Science:

    • Epidemiology
    • Cancer Research
    • Public Health

    Background:

    • Cancer diagnosis methods vary, potentially influencing demographic analyses.
    • Understanding these differences is crucial for accurate epidemiological studies.

    Purpose of the Study:

    • To investigate race, age, and sex disparities between clinically and microscopically diagnosed cancer cases.
    • To assess the impact of diagnostic methods on cancer patient demographics.

    Main Methods:

    • Analysis of 63,301 incident cancer cases across 18 sites diagnosed between 1973-1978.
    • Comparison of demographic data (race, age, sex) based on diagnostic method (clinical vs. microscopic).
    • Data sourced from the Michigan Cancer Foundation, a Surveillance, Epidemiology, and End Results (SEER) program participant.

    Main Results:

    • Significant age differences were observed in 15 out of 18 cancer sites examined.
    • Clinically diagnosed cancer cases were consistently older than microscopically confirmed cases.
    • Minor differences in race and sex were noted for a few specific cancer sites.

    Conclusions:

    • The method of cancer case diagnosis significantly influences age-related findings.
    • Case selection based on diagnostic method can affect the interpretation of age differences in cancer risk factor studies.
    • Researchers should consider diagnostic methodology when analyzing demographic data in cancer epidemiology.

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