Initiation and Completion of Hormone Therapy in Older Women With Early-Stage Borstkanker

Clinical trials suggest that adjuvant radiation therapy (RT) may be omitted in women aged ≥65 years with early-stage, hormone-receptor-positive breast cancer, provided completion of 5 years of hormone therapy. However, at the time of RT consult, it is often unknown whether the patient will start hormone therapy or will start but not complete 5 years of therapy, either of which, if known in advance, would alter RT recommendations. We studied a cohort of patients who would have been eligible for RT omission to examine factors associated with declining or discontinuing hormone therapy.