Modification of the Associations Between Duration of Oral Contraceptive Use and Ovarian, Endometrial, Breast, and Colorectal Cancers

Findings In this population-based cohort study of more than 100, 000 predominantly postmenopausal women, risk reductions for ovarian cancer associated with increasing duration of oral contraceptive use were generally consistent across health behaviors. For endometrial cancer, the reductions were strongest among current smokers, obese women, and those who exercised rarely; lack of associations with breast and colorectal cancer were consistent across health behaviors.

• Source: Jamanetwork
• 524
• January 22, 2018