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Evaluate the independent prognostic value of the risk score by using the Cox regression analysis. The (A) univariate cox regression and (B) multivariate cox regression analysis of age, gender, grade, and risk score. Calculate the AUC for age, gender, grade, and risk score of the total survival according to the multivariate time-dependent ROC curve for 1-year (C), 3-years (D) and 5-years (E).
