Table 4.
Comparison in predicting 30-day mortality between the standard model and the new model.
| 30-day mortality | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Patients with events | Patients without events | ||||||||
| New model | New model | ||||||||
| Standard | <20% | 20–40% | >40% | All | Standard | <20% | 20–40% | >40% | All |
| <20% | 4 | 0 | 1 | 5 | <20% | 47 | 2 | 1 | 50 |
| 20–40% | 2 | 12 | 6 | 20 | 20–40% | 10 | 18 | 4 | 32 |
| >40% | 1 | 0 | 79 | 80 | >40% | 0 | 8 | 23 | 31 |
| All | 7 | 12 | 86 | 105 | All | 57 | 28 | 28 | 113 |
| NRI+ = 0.038 | NRI- = 0.097 | ||||||||
| NRI [95%CI] | 0.1354 [0.0323–0.2385] | p = 0.010 | |||||||
| IDI [95%CI] | 0.0526 [0.0158–0.0894] | p = 0.005 | |||||||
NRI: net reclassification improvement, IDI: integrated discrimination improvement. The NRI was calculated using 20% and 40% as the thresholds to define the risk grade of 30-day mortality.