highly significantP = 0.002
60 EBCTCG meta-analysis found highly significant reductions in recurrence (rate ratio [RR] 0.86; 95% CI 0.78–0.94; P = 0.002), distant recurrence (RR 0.82; 95% CI 0.74–0.92; P = 0.0003), bone recurrence (RR 0.72; 95% CI 0.60–0·86; P = 0.0002), and breast cancer mortality (RR 0.82; 95% CI 0.73–0.93; P = 0.002) in postmenopausal women while in prem