Competing Mortality, Not Breast-Cancer Mortality, Explains the Survival Deficit of Breast Cancer After a Prior Non-Breast Cancer: A SEER Competing-Risks Analysis
Background and Objectives: Women who develop breast cancer after a previous cancer of another site have poorer overall survival, yet it is unsettled whether the breast cancer itself is more lethal or whether the deficit reflects competing causes of death in an older, previously treated population. We decomposed this su...