Effect of hospital and physician volume on outcome
| Odds of Worse Outcome at Hospital Discharge (Four-Level Scale) | |
|---|---|
| Hospital volume-unruptured aneurysm coiling | 0.28 (0.14–0.54) P < 0.001 |
| Hospital volume-all aneurysm coiling | 0.34 (0.18–0.63) P < 0.001 |
| Hospital volume-unruptured aneurysm, coiling or clipping | 0.29 (0.11–0.77) P = 0.01 |
| Hospital volume-all aneurysm, coiling or clipping | 0.34 (0.12–0.95) P = 0.04 |
| Physician volume-unruptured aneurysm coiling | 0.11 (0.02–0.80) P = 0.03 |
| Physician volume-all aneurysm coiling | 0.10 (0.02–0.63) P = 0.01 |
| Hospital clipping-unruptured aneurysm volume | 0.49 (0.13–1.84) P = 0.3 |
| Hospital clipping-any aneurysm volume | 0.51 (0.14–1.88) P = 0.3 |