Fig. 4From: Efficacy of adjuvant chemotherapy stratified by age and the 21-gene recurrence score in estrogen receptor-positive breast cancerPrognosis of patients according to chemotherapy usage at 55 years of age. Rates of Invasive disease-free survival according to chemotherapy usage in (a) patients ≤55 years with RS ≤25, (b) patients ≤55 years with RS > 25, (c) patients > 55 years with RS ≤36, and (d) patients > 55 years with RS > 36Back to article page