Figure 4. Validation of the predictive power of the risk signature in the validation set. (A) Distribution of risk scores. (B) Survival status of each case. (C) Heat map of ERG expression. (D) ROC analysis of the survival-related prognostic signature. (E) Kaplan–Meier (KM) survival curves for the overall survival of the risk score. (F) Comparison of survival rate between two groups.