Table S2. Interaction between surgeon and hospital volume on outcomes.
| Study | Outcomes reported | Hospital–surgeon volume category | |||
|---|---|---|---|---|---|
| High hospital–high surgeon volume | Low hospital–high surgeon volume | High hospital–low surgeon volume | Low hospital–low surgeon volume | ||
| Renzulli 2006 | Patient N | 286 | 150 | 145 | 334 |
| 5–year survival | 78% | 76% | 68% | 60% | |
| 5–year survival absolute difference | (Reference) | –2% | –10% | –18% | |
| Callahan 2003 | Surgeon N | 135 | 168 | 895 | 1453 |
| Patient N | 14973 | 9289 | 9106 | 15160 | |
| Observed mortality rate | 3.2% | 4.2% | 5.0% | 6.2% | |
| Mortality rate absolute increase | Reference | +1.0% | +1.8% | +3.0% | |
| Adjusted OR (95% CI) | 1.00 (Reference) | 1.19 (0.98–1.44) | 1.54 (1.30–1.84)* | 1.82 (1.53–2.17)* | |
| Hannan 2002 | Mortality rate absolute increase % | (Reference) | +1.2% | +0.7% | +2.3% |
| Harmon 1999 | Relative risk of mortality | 0.58* | 0.63* | 0.8* | 1.00 (Reference) |
*, Significant P value <0.05, N, number.