Exogenous estrogens and breast cancer in women with natural menopause.
Age, age at menopause, and calendar year at menopause were controlled as factors related to estrogen use. Data on 90 breast cancer patients and 83 conrols--all of whom had a natural menopause--showed no relationship between breast cancer and estrogen usage after the start of menopause symptoms.
D000367:Age Factors; D001943:Breast Neoplasms / Q000209:etiology*; D004967:Estrogens / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008593:Menopause; D008875:Middle Aged; D012189:Retrospective Studies
D004967:Estrogens