Figure 7. OS by chemotherapy regimens and age group. (A) HRs for OS are presented by non-ANT-based versus ANT-based regimens in early-stage patients who received (A) CMT or (B) CT, and (C) in advanced-stage patients. The solid line represents the HR estimate, and dashed lines represent 95% CIs. OS, overall survival; HR, hazard ratio; ANT, anthracycline; CMT, combined modality therapy; CT, chemotherapy; CI, confidence interval.