From: Reporting performance of prognostic models in cancer: a review
 | Articles with risk groups (n = 36) | Articles with PI but no risk groups (n = 6**) |
---|---|---|
Presentation of discrimination of model predictions†|  |  |
   KM for risk groups | 34 | NA |
   Nomogram | 2 | 4 |
   Other graphical | 2 | 2 |
   % survival probability at fixed time††| 22 | 0 |
   Index of discrimination (see below) | 9 | 2 |
   Log rank | 17 | NA |
   Unspecified P-value | 6 | 0 |
No presentation | 0 | 0 |
Index of discrimination$ | Â | Â |
   c-index | 7 | 1 |
   R squared or goodness of fit or Brier score | 1 | 1 |
   D | 0 | 0 |
   Other - K (Begg), sensitivity and specificity | 2 | 0 |
   Reclassification of patient risk | 0 | 0 |
Calibration | Â | Â |
   Yes | 1 | 1 |
   No | 35 | 5 |
Model usability from article$$ | Â | Â |
   Prognostic score or risk group can be assigned | 33 | 6 |
   Survival presented for risk group and/or prognostic score | 36 | 5 |
   Instructions for use suitable for physicians included | 3 | 3 |