Chemotherapy Treatment and Survival in Older Women with Estrogen Receptor–Negative Metastatic Breast Cancer: A Population‐Based Analysis

Abstract

Chemotherapy received within 6 months after diagnosis was associated with a 39% lower hazard of death within the time period for the study. These findings reflect chemotherapy use outside of the clinical trial setting and have important clinical and policy implications for the study of treatments in older women with advanced ER- breast cancer.