Table 4.
Measure |
Derivation data |
Validation data |
||
---|---|---|---|---|
Estimate | SE | Estimate | SE | |
Harrell c-index |
0.673 |
0.009 |
0.658 |
0.016 |
Gönen & Heller K |
0.655 |
0.008 |
0.645 |
0.015 |
Explained variation () |
0.166 |
0.017 |
0.145 |
0.033 |
HR: group 2 versus 1 |
1.58 |
0.19 |
1.63 |
0.35 |
HR: group 3 versus 1 |
3.33 |
0.39 |
3.34 |
0.70 |
HR: group 4 versus 1 | 4.75 | 0.60 | 6.33 | 1.54 |
All values are based on the PI of the prognostic model. Risk groups were defined as described in the text. Standard errors (SE) for the c-index and for RD2 were estimated from 200 bootstrap samples. HR = hazard ratio.