What was the risk of hemorrhagic stroke in the Swedish Women's Lifestyle and Health Cohort?
In the Swedish Women's Lifestyle and Health Cohort, there was a significant decrease in hemorrhagic stroke among women who were parous (versus nulliparous; HR, 0.5; 95% CI, 0.2 0.8) and a nonsignificant increase in women who started OC use after 30 years of age (HR, 2.3; 95% CI, 0.8 6.8) and stopped using OCs based on doctor recommendation for medical reasons (adjusted HR, 2.1; 95% CI, 0.9 5.0).