Table 4.
Variation in risk-adjusted survival and postoperative complications across cardiac surgery units.
| Outcome measure | Units reporting | Overall | Variation across units | ||
| Median | IQR | Range | |||
| Risk-adjusted mortality (%) | 16 | 2.1 | 2.1 | 1.8, 2.5 | 1.4, 3.7 |
| Re-sternotomy for bleeding (%) | 14 | 5.0 | 4.8 | 3.7, 5.7 | 3.5, 6.9 |
| Re-sternotomy for mediastinitis (%) | 11 | 0.4 | 0.4 | 0.2, 0.8 | 0.1, 1.0 |
| TIA/CVA (%) | 13 | 1.6 | 1.7 | 1.0, 1.9 | 0.3, 3.0 |
| Haemofiltration (%) | 14 | 3.5 | 3.7 | 2.5, 4.5 | 0.8, 6.8 |
| IABP use (%) | 14 | 3.2 | 3.3 | 1.5, 5.6 | 0.4, 7.4 |
| Tracheostomy (%) | 8 | 1.8 | 1.6 | 1.4, 2.0 | 1.3, 2.6 |
| Laparotomy (%) | 7 | 0.3 | 0.3 | 0.2, 0.4 | 0.2, 0.6 |
CVA, cerebrovascular accident; IABP, intra-aortic balloon pump; IQR, interquartile range; TIA, transient ischemic attack.