Figure 9. Validation of the prognostic value of risk score in the validation cohort. Patients in the high-risk group exhibited a higher incidence of dead events (A). Kaplan-Meier plot revealed a poorer overall survival in high-risk group (B). Univariate and multivariate Cox regression model confirmed that the risk score was an independent prognostic predictor for overall survival in the validation cohort (C, D).