Table 2.
P-values of randomization test based on 10,000 permutations for the three measures: Somers’ correlation (Dxy), p-value of the hazard ratio, and R2from fitting the Cox proportional hazards model using the risk scores as independent variable
| 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 |