| Variable | CK - MB | n | HR (95% CI) | p-value |
| Extracorporeal circulation time [min.] | <25 | 92 | 0.42 (0.30 - 0.57) | <0.001 |
| 25 - 49 | 99 | 0.80 (0.59 - 1.07) | 0.135 | |
| 50 - 74 | 77 | 1.10 (0.80 - 1.50) | 0.552 | |
| 75 - 99 | 67 | 1.17 (0.84 - 1.63) | 0.355 | |
| ≥100 (ref.) | 78 | 1 | ||
| Aortic cross - clamp time [min.] | <25 | 92 | 0.54 (0.40 - 0.73) | <0.001 |
| 25 - 49 | 98 | 0.87 (0.64 - 1.18) | 0.361 | |
| 50 - 74 | 76 | 1.23 (0.89 - 1.70) | 0.215 | |
| 75 - 99 | 65 | 1.18 (0.84 - 1.65) | 0.333 | |
| ≥100 (ref.) | 73 | 1 |