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Related Experiment Videos

Exogenous estrogens and breast cancer

D H Lawson, H Jick, J R Hunter

    American Journal of Epidemiology
    |November 1, 1981
    PubMed
    Summary

    Breast cancer rates remained stable in younger and older women, but declined in middle-aged women as estrogen drug use fell. This suggests estrogen may play a role in middle-aged women's breast cancer risk.

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    Area of Science:

    • Epidemiology
    • Oncology
    • Pharmacology

    Background:

    • Estrogen-containing drug use has varied significantly over time.
    • Understanding the relationship between exogenous estrogen and breast cancer is crucial for public health.

    Purpose of the Study:

    • To investigate the association between estrogen-containing drug use and breast cancer incidence.
    • To analyze trends in breast cancer rates across different age groups in relation to estrogen use.

    Main Methods:

    • Retrospective analysis of breast cancer rates.
    • Correlation of cancer rates with estrogen-containing drug usage patterns.
    • Data collected from Group Health Cooperative of Puget Sound, Seattle, Washington.

    Main Results:

    • Breast cancer rates were stable in women aged 30-44 and 55-64 from 1972-1979.
    • Breast cancer rates in women aged 45-54 appeared to decrease since 1977.
    • This decrease coincided with a significant drop in estrogen use among women in the 45-54 age group.

    Conclusions:

    • Current exogenous estrogen use may have an etiologic role in breast cancer development.
    • The findings suggest a specific risk associated with estrogen in middle-aged women.
    • Further research is warranted to confirm the link between estrogen and breast cancer.

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