Table 5.
Statistics for model improvement with the addition of uric acid.
| Goodness of fit (GRACE risk score)a | 0.742 |
| Goodness of fit (GRACE + uric acid)a | 0.149 |
| Events (n) | 52 |
| Nonevents (n) | 631 |
| Continuous NRI | |
| cNRIevents | 11.5 (–8.7 to 32.0) |
| cNRInonevents | 32.5 (11.8 to 50.0) |
| cNRI | 44.0 (13.3 to 72.4) |
| IDI statistics | |
| IDIevents | 0.048 (0.004 to 0.111) |
| IDInonevents | 0.004 (0.000 to 0.009) |
| IDI | 0.052 (0.005 to 0.119) |
| AUC | |
| GRACE risk score | 0.78 (0.71 to 0.83) |
| GRACE + uric acid | 0.79 (0.73 to 0.85) |
| Difference (p-value) | 0.350 |
Values are % (95% CI) unless otherwise stated.
a
Hosmer–Lemeshow goodness of fit test (p-value).
AUC, area under the curve of the receiver operator characteristic curve; IDI, integrated discrimination improvement; NRI, net reclassification improvement.