Risk Reduction of Breast Cancer by Childbirth Breastfeeding and Their Interaction in Korean Women: Heterogeneous Effects Across Menopausal Status Hormone Receptor Status and Pathological Subtypes

摘要

ObjectivesThe purpose of this study was to examine the associations of childbirth, breastfeeding, and their interaction with breast cancer (BC) risk reduction, and to evaluate the heterogeneity in the BC risk reduction effects of these factors by menopause, hormone receptor (HR) status, and pathological subtype.