| CPE (95% CI) | |
| RECPAM classifications | |
| All patients | |
| Albain et al. [5] | 0.63 (0.61–0.65) |
| Sagman et al. [6] | 0.62 (0.61–0.65) |
| Paesmans et al. [4] | 0.62 (0.60–0.64) |
| Sculier et al. [2] | 0.63 (0.61–0.65) |
| Patients with extensive disease | |
| Albain et al. [5] | 0.58 (0.55–0.60) |
| Sagman et al. [6] | 0.55 (0.53–0.57) |
| Paesmans et al. [4] | 0.58 (0.55–0.60) |
| Sculier et al. [2] | 0.57 (0.54–0.59) |
| Foster et al. [7] | 0.56 (0.54–0.59) |
| Cox models | |
| All patients | |
| Paesmans et al. [4] | 0.64 (0.62–0.66) |
| Sculier et al. [2] | 0.65 (0.63–0.67) |
| Patients with extensive disease | |
| Paesmans et al. [4] | 0.58 (0.55–0.60) |
| Sculier et al. [2] | 0.59 (0.56–0.62) |
| Foster et al. [7] | 0.60 (0.57–0.63) |
The CPE represents the proportion of patients in whom the predicted and observed survival times are ordered the same way. RECPAM: recursive partitioning and amalgamation.