Adjuvant endocrine therapy in pre‑ versus postmenopausal patients with steroid hormone receptor‑positive breast cancer: results from a large population‑based cohort of a cancer registry

Purpose Adjuvant endocrine therapy (ET) is indicated in patients with steroid hormone receptor (HR)-positive breast cancer. The aim of this study was to evaluate the quality of HR determination and adjuvant endocrine treatment of breast cancer patients in a large cohort of more than 7000 women by analyzing data from a population-based regional cancer registry.