Table I. Patient risk level and complexity of the operation by usefulness rating.
| Usefulness Response | N | Mean Surgeon Risk Estimate | Mean Model Risk Estimate | Mean Work RVU | ||
|---|---|---|---|---|---|---|
| Mortality | Morbidity | Mortality | Morbidity | |||
| Not Useful (1, 2) | 285 | 0.51% | 8.29% | 0.54% | 9.63% | 17.77 |
| Neutral (3) | 468 | 0.44% | 4.77% | 0.29% | 5.70% | 13.74 |
| Useful (4, 5) | 249 | 0.79% | 8.72% | 0.68% | 10.69% | 18.24 |
| Difference 1-2 vs. 3 | 0.1904 | <.0001 | 0.0015 | <.0001 | <.0001 | |
| Difference 3 vs. 4-5 | <.0001 | <.0001 | <.0001 | <.0001 | <.0001 | |
| Difference 1-2 vs. 4-5 | 0.0007 | 0.6099 | 0.2355 | 0.2553 | 0.6895 | |
Note. Usefulness response options: 1 = Not Useful, 2 = Moderately Un-useful, 3 = Neutral, 4 = Moderately Useful, 5 = Very Useful. Independent samples t-tests were used to compare mean differences across usefulness ratings on patient risk level and complexity of the operation.