Performance measures before (apparent) and after bootstrap-corrected optimism within the 2013–2014 data (n=2969)
| Validation | Calibration intercept (95% CI) | Calibration slope (95% CI) | AUC (95% CI) |
| Apparent | 0.00 (−0.18 to 0.18) | 1.00 (0.76 to 1.24) | 0.70 (0.65 to 0.75) |
| Internal* | 0.02 (−0.17 to 0.20) | 0.79 (0.55 to 1.03) | 0.66 (0.61 to 0.71) |
*Estimated as the apparent performance minus optimism, where optimism was obtained through bootstrap resampling.
AUC, area under the curve.