- Predictive ability measures of prognostic model evaluated in derivation and validation datasets
| Measures | Derivation data | Validation data | ||
|---|---|---|---|---|
| Estimate | SE | Estimate | SE | |
| Harrell’s c index | 0.697 | - | 0.748 | - |
| Gonen & Heller k statistic | 0.615 | 0.019 | 0.647 | 0.023 |
| Somers’ D statistic | 0.395 | - | 0.496 | - |
| Calibration slope | - | - | 1.156 | 0.026 |
| HR: group 2 versus 1 | 2.441 | 0.823 | 2.506 | 0.871 |
| HR: group 3 versus 1 | 4.278 | 1.404 | 5.687 | 1.913 |
HR: hazard ratio, SE: standard error