Kaplan-Meier and multivariable Cox proportional hazard regression analyses of DRFI in patients randomly assigned to 2 years of goserelin, tamoxifen, and the combination of goserelin and tamoxifen, compared with patients randomly assigned to no adjuvant endocrine therapy (control), stratified by genomic risk. (A-C) Patients of low genomic risk and (D-F) patients of high genomic risk. aMultivariable analysis adjusted for age, random assignment year, lymph node status, tumor size, tumor grade, PR status, HER2 status, Ki-67 status, and type of surgery. DRFI, distant recurrence-free interval; DRs, distant recurrences; HER2, human epidermal growth factor receptor 2; HR, hazard ratio; PR, progesterone receptor; ref, reference.