To evaluate the efficacies of cyclophosphamide, methotrexate, and fluorouracil (CMF) and tegafur-uracil (UFT) as adjuvant therapy in patients with resected stage I-IIIA breast cancer...A total of 689 patients (342 CMF and 347 UFT) were included in the analyses with a median follow-up of 11.1 years. There was no significant difference in RFS or OS between the two cohorts...RFS was significantly longer in patients treated with UFT compared with CMF in patients with HR-/HER2+ subtype (0.30 [0.10-0.88], p = 0.03).