Table 2. Hospital- and Surgeon-Level Volume-Outcome Associations of Mitral Valve Surgery for Primary Mitral Regurgitationa.
| Outcome | Unadjusted | Adjusted | ||
|---|---|---|---|---|
| OR (95% CI) | P value | OR (95% CI) | P value | |
| Hospital level | ||||
| Operative mortality | 2.21 (1.57-3.12) | <.001 | 2.06 (1.47-2.90) | <.001 |
| Composite | 1.40 (1.18-1.67) | <.001 | 1.35 (1.14-1.60) | <.001 |
| Repair success | 0.57 (0.38-0.87) | .004 | 0.50 (0.34-0.72) | <.001 |
| Surgeon level | ||||
| Operative mortality | 2.74 (2.05-3.67) | <.001 | 2.25 (1.68-3.01) | <.001 |
| Composite | 2.00 (1.73-2.30) | <.001 | 1.72 (1.50-1.98) | <.001 |
| Repair success | 0.59 (0.43-0.83) | .002 | 0.62 (0.45-0.85) | .003 |
Abbreviation: OR, odds ratio.
a
Comparisons are for the lowest vs highest quartiles of procedure volume.