Development and Validation of a Competing-Risk Nomogram for Predicting Breast Cancer–Specific Survival in Young Women with Early-Stage Breast Cancer: A SEER-Based Study
Background & Objective: Breast cancer in women aged ≤40 years is biologically aggressive and carries a disproportionate cancer-specific mortality risk. Existing prognostic tools predominantly predict overall survival, rarely account for competing risks of non-cancer death, and have not evaluated whether primary treatme...