Table 4.
Measures of model fit from Cox regression in the validation group
| Concordance index (95% CI; rank)* | Bayes information criterion (rank)† | Generalised R2 (rank)‡ | |
|---|---|---|---|
| Database Consortium model | 0·664 (0·639–0·689; 2) | 4341 (1) | 0·185 (1) |
| CCF | 0·662 (0·636–0·687; 3) | 4361 (3) | 0·161 (3) |
| French | 0·640 (0·614–0·665; 5) | 4380 (5) | 0·136 (5) |
| IKCWG | 0·668 (0·645–0·692; 1) | 4370 (4) | 0·149 (4) |
| MSKCC | 0·657 (0·632–0·682; 4) | 4359 (2) | 0·163 (2) |
n=672, patients with complete data only. CCF=Cleveland Clinic Foundation. IKCWG=International Kidney Cancer Working Group. MSKCC=Memorial Sloan-Kettering Cancer Center.
*
A high concordance index suggests high discriminatory value.
†
A low value suggests a good global fit.
‡
A large R2 suggests that the model is strongly associated with the outcome.