Adherence to oral endocrine therapy by menopausal status: post hoc insights from a remote monitoring randomized trial

Oral adjuvant endocrine therapy (AET) improves survival in hormone receptor-positive breast cancer, but younger, premenopausal women often struggle with adherence. In a post hoc analysis of a randomized trial (N = 304), app-based remote symptom monitoring improved 12-month AET adherence among premenopausal women (App-only: 53.9% vs. EUC: 25.0%), with no benefit for postmenopausal women. Findings suggest remote monitoring may help close adherence gaps in younger patients. Prospectively registered on ClinicalTrials.gov: NCT03592771.