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Concordance index (CI) and 95% confidence intervals for each of the four individual predictors along with the multivariable regression model
| Predictors | Concordance index | Lower 0.95 | Upper 0.95 |
|---|---|---|---|
| Nomogram | 0.943 | 0.889 | 0.983 |
| ITE* score in PGY1 | 0.839 | 0.751 | 0.913 |
| ITE* score in PGY2 | 0.872 | 0.793 | 0.940 |
| ITE* score in PGY3 | 0.940 | 0.855 | 0.988 |
| Number of call months in the past 6 months | 0.570 | 0.387 | 0.726 |
In-Training Examination score expressed as percentage of questions answered correctly.
