1 Stanford Prevention Research Center, Departments of Medicine and of Obstetrics and Gynecology, Hoover Pavilion, Stanford University, 211 Quarry Road, Stanford, CA 94305-5705, USA. stefanick@stanford.edu
Reanalysis of the Women's Health Initiative (WHI) data regarding prior oral contraceptive use and the effect on cardiovascular disease reveals no evidence of a delayed benefit or harm. The WHI database was not designed to answer this question.