Fig. 5

Internal and external validation of the prognostic risk score system. (A) Kaplan-Meier plots of the high- and low-risk groups in the internal validation set (n = 386). (B) The 1-, 3-, and 5-year ROC curves in the internal validation set. (C) Kaplan-Meier plots of the high- and low-risk groups in the whole set (n = 1930). (D) The 1-, 3-, and 5-year ROC curves in the whole set. (E) Kaplan-Meier plots of the high- and low-risk groups in the validation set from our center (n = 174). (F) Kaplan-Meier plots of the high- and low-risk groups in the validation set from our center