Table 4. Outcomes at Surgeon Level Before and After Matching.
| Outcome | Mean (SD) | Mean Risk Difference (95% CI) | P Value | Median Risk Difference (95% CI) | P Value | |
|---|---|---|---|---|---|---|
| NUBR | UBR | |||||
| Before Matching | ||||||
| Complication | 14.15 (10.20) | 17.32 (14.82) | −3.17 (−4.21 to −2.13) | <.001 | −1.52 (−2.32 to −0.72) | <.001 |
| PLOS | 19.54 (8.97) | 21.43 (12.78) | −1.89 (−2.79 to −0.98) | <.001 | −0.87 (−1.56 to −0.17) | .01 |
| Mortality | 1.80 (3.32) | 2.80 (6.54) | −1.01 (−1.41 to −0.61) | <.001 | −0.002 (−0.005 to 0.002) | .93 |
| After Matching | ||||||
| Complication | 14.69 (10.35) | 14.50 (9.68) | 0.20 (−1.04 to 1.43) | .76 | 0.02 (−1.09 to 1.11) | .98 |
| PLOS | 20.02 (8.94) | 19.61 (9.03) | 0.40 (−1.76 to 1.57) | .50 | 0.30 (−0.68 to 1.30) | .55 |
| Mortality | 1.94 (3.63) | 1.81 (2.71) | 0.13 (−0.28 to 0.53) | .53 | 0.07 (−0.17 to 0.32) | .55 |
Abbreviations: NUBR, nonuniversity-based residency; PLOS, prolonged length of stay; UBR, university-based residency.