Table 7.
Risk-adjusted Comparison of Physician Outcomes
| Any Preventable or Possibly Preventable (P/PP) Event | ||||
|---|---|---|---|---|
| Operator | Observed Event Rate | Expected* Rate for Case Mix | SAER† | 95% Confidence Interval |
| A | 14.2% | 10.8% | 1.32 | (0.86, 1.93) |
| B | 10.9% | 8.9% | 1.22 | (0.82, 1.74) |
| C | 10.7% | 10.8% | 1.00 | (0.71, 1.34) |
| D | 4.5% | 6.3% | 0.71 | (0.42, 1.12) |
| E | 7.9% | 8.3% | 0.96 | (0.55, 1.56) |
| F | 7.8% | 6.5% | 1.20 | (0.64, 2.06) |
| G | 3.2% | 7.8% | 0.41 | (0.11, 1.06) |
| Total | 8.5% | 8.5% | 1.00 | |
| Any P/PP Severity Level 3, 4, or 5 Events | ||||
| Operator | Observed Event Rate | Expected* Rate for Case Mix | SAER† | 95% Confidence Interval |
| A | 6.6% | 4.6% | 1.44 | (0.74, 2.51) |
| B | 5.1% | 3.9% | 1.30 | (0.71, 2.18) |
| C | 4.8% | 6.2% | 0.79 | (0.46, 1.24) |
| D | 2.0% | 2.0% | 0.99 | (0.46, 1.94) |
| E | 3.0% | 3.4% | 0.87 | (0.32, 1.89) |
| F | 3.6% | 3.3% | 1.08 | (0.39, 2.35) |
| G | 2.4% | 3.5% | 0.69 | (0.14, 2.02) |
| Total | 3.9% | 3.9% | 1.00 | |
*
The final multivariable models for each outcome were used to predict the probability of adverse event occurrence for each case in the data set based on the final characteristics retained in the model. The expected adverse event rate was calculated by summing the probabilities of an adverse event (generated from the logistic regression model) for all cases performed by a practitioner and dividing by the total number of cases performed by the physician.
†
A standardized adverse event ratio (SAER) was generated by dividing the observed adverse event rate by the expected adverse event rate.