a Overall, b Premenopausal and c Postmenopausal. Forest plot shows relative risks and 95% confidence intervals comparing highest category versus lowest category, using random-effect models. BWHS Black Women’s Health Study, EPIC European Prospective Investigation into Cancer and Nutrition, JPHC Japan Public Health Center-based Prospective Study, LWS Leisure World Study, NHEFS National Health Epidemiologic Follow-up Study, NHS Nurses’ Health Study, NHSII Nurses’ Health Study II, WLH Swedish Women’s Lifestyle and Health Study.