Exogenous hormones and colorectal cancer risk in Canada: associations stratified by clinically defined familial risk of cancer.

Abstract excerpt

OBJECTIVE: This work assessed associations between colorectal cancer risk and postmenopausal/contraceptive hormones; subgroup analyses included women with a clinically defined family history of cancer. METHODS: A population based case-control study of incident colorectal cancer was conducted among women aged 20-74 years in Ontario and Newfoundland & Labrador, Canada. Incident cases (n = 1,404) were selected from...

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