Women who smoke during adolescence could be at an increased risk of breast cancer later in life compared with women who are non-smokers.
Dr Pierre Band and colleagues from the Canadian government Health Canada, initially enrolled 1,431 women under the age of 75 who had breast cancer and were listed on the population-based British Columbia cancer registry between June 1, 1988, and June 30, 1989, and 1,502 age-matched controls, randomly selected from the 1989 provincial voters list.
Researchers aimed to assess the carcinogenic and possibly antioestrogenic effects of cigarette smoke on risk breast cancer risk. They obtained information on all known and suspected risk factors for breast cancer, and on lifetime smoking, alcohol consumption, and occupational history.
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