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Table 2 P-values of randomization test based on 10,000 permutations for the three measures: Somers’ correlation (D xy ), p-value of the hazard ratio, and R 2 from fitting the Cox proportional hazards model using the risk scores as independent variable

From: Assessment of performance of survival prediction models for cancer prognosis

Model M1 (Original predictors) M2 (Re-select predictors)
Dxy P R2 Dxy P R2
A 0.0369 0.0225 0.0261 0.0369 0.0225 0.0261
B 0.0707 0.3622 0.3802 0.0499 0.1747 0.1788
C 0.2684 0.6027 0.6084 0.3146 0.6761 0.6838
D 0.0487 0.0718 0.0661 0.0387 0.0445 0.0383
E 0.2534 0.3170 0.3255 0.2588 0.3078 0.3166