Predictive accuracy of the IRS
| Variable . | t = 3 mo . | t = 6 mo . | t = 12 mo . | t = 18 mo . | t = 24 mo . |
|---|---|---|---|---|---|
| Derivation set, % | |||||
| Apparent c-index | 83 | 78.2 | 72.2 | 67.9 | 67.5 |
| Bootstrap c-index | 82.9 | 78.4 | 72.6 | 68.1 | 68 |
| Validation set, % | |||||
| Apparent c-index | 67.9 | 67.1 | 65 | 65.6 | 62.7 |
| Bootstrap c-index | — | 67.7 | 64.9 | 65.7 | 63 |
| Variable . | t = 3 mo . | t = 6 mo . | t = 12 mo . | t = 18 mo . | t = 24 mo . |
|---|---|---|---|---|---|
| Derivation set, % | |||||
| Apparent c-index | 83 | 78.2 | 72.2 | 67.9 | 67.5 |
| Bootstrap c-index | 82.9 | 78.4 | 72.6 | 68.1 | 68 |
| Validation set, % | |||||
| Apparent c-index | 67.9 | 67.1 | 65 | 65.6 | 62.7 |
| Bootstrap c-index | — | 67.7 | 64.9 | 65.7 | 63 |
t, time.