Risk of Breast Cancer with Oral Contraceptive Use in Women with a Family History of Breast Cancer
Dawn M. Grabrick, Lynn C. Hartmann, James R. Cerhan, et al.
Abramson Cancer Center of the University of Pennsylvania
Last Modified: November 1, 2001
Reviewers: Li Liu, MD
Source: JAMA, Volume 284:1791-1798, (October) 2000
Précis: Some oral contraceptives may link to higher risk of developing breast cancer
IntroductionBreast cancer is common and on the increase. Use of hormonal contraceptives is also common and is expected to increase worldwide. Whether hormonal contraceptives (OC) cause breast cancer is an important public health question, as well as one of great importance to women and men choosing their method of family planning. Thus, even a small increase in the risk of breast cancer in women using OCs would be important because of the frequency of the exposure. In this study, the researchers reported risk of developing breast cancer associated with OC use.
MethodA total of 3396 blood relatives of breast cancer patients and 2754 women who married into families with breast cancer were included to determine whether OC use could increase risk of breast cancer in women with family history of breast cancer.
- Among the entire group of women, ever use of OCs was associated with a relative risk (RR) of 1.4 for breast cancer.
- The association was significant only among sisters and daughters of breast cancer patients. They had 3.3 times the risk of sisters and daughters who never used OCs.
- This elevated risk was seen only in those who used OCs for any duration prior to 1975. There was no association between any OC use after 1975 and the risk of breast cancer.