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 |