Figure 2.

Overall survival in high-risk breast cancer patients. Shown are Kaplan-Meier probability plots of overall survival in high-risk breast cancer patients as a function of randomization to postmastectomy radiotherapy (RT) within the subgroups of carbonic anhydrase (CA) IX negative and CA IX positive patients. The values given in parentheses after hazard ratios (HRs) are the 95% confidence intervals.