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A previous analysis of more than 50 studies suggested that current users of oral contraceptives (OCs) and those who had used OCs in the previous 10 years had a minimally elevated risk for breast cancer, while women who had used OCs less recently had no increase in risk (Journal Watch Women's Health Aug 1 1996). These researchers obtained new data by interviewing 4575 women (age range, 35 to 64) with breast cancer (diagnosed between 1994 and 1998) and 4682 controls in 5 U.S. cities. The controls -- women without diagnoses of invasive or in situ breast cancer -- were identified through random-digit dialing. Overall, 75% of cases and 79% of controls had ever used OCs.
Compared with women who had never used OCs, ever-users were not at increased …