Prediction of prognosis in high-risk and low-risk patients based on the prognostic index.

High-risk patients had significantly short progression-free survival times compared to low-risk patients (A) in the discovery set (log rank test, p<0.0001) and (B) in the external set (log rank test, p = 0.0004). Similarly, high-risk patients had significantly shorter overall survival times compared to low-risk patients (C) in the discovery set (log rank test, p<0.0001) and (D) in the external set (log rank test, p = 0.0010).