Table 3.
Prediction model performance in the test set, according to readmission outcomes
| Model performance measures | Overall 30-day readmission |
Early readmission (within 7 days after discharge) |
Late readmission (8–30 days after discharge) |
|||
|---|---|---|---|---|---|---|
| Reference model | Optimized model | Reference model | Optimized model | Reference model | Optimized model | |
| C statistic (95%CI) |
0.57 (0.52 to 0.62) |
0.58 (0.54 to 0.63) |
0.57 (0.50 to 0.64) |
0.63 (0.56 to 0.70) |
0.65 (0.60 to 0.71) |
0.68 (0.62 to 0.73) |
| Integrated discrimination improvement (95%CI) | – |
0.009 (−0.001 to 0.020) |
– |
0.018 (0.003 to 0.032) |
– |
0.026 (0.009 to 0.042) |
| Continuous net reclassification improvement, (95%CI) | – |
0.135 (− 0.031 to 0.302) |
– |
0.298 (0.060 to 0.537) |
– |
0.243 (0.028 to 0.459) |
Abbreviation: CI Confidence interval
Models were derived from 1000 bootstrap resamples
For the model comparisons, the integrated discrimination improvement and net reclassification improvement values of > 0 indicate that, compared to the reference model, the optimized model has better discrimination and reclassification performance