| Parameters | MRI/A (+) | MRI/Aa (−) | p value |
| Intraoperative | |||
| Graft (n) | 3.76 ± 1.373 | 3.93 ± 1.319 | 0.268 |
| Use of ITA (%)b | 98.3 | 96.9 | 0.502 |
| All arterial grafts (%) | 43.6 | 47.5 | 0.527 |
| Use of IABP (%)c | 17.0 | 21.0 | 0.502 |
| Use of pump (%) | 6.6 | 5.0 | 0.654 |
| Postoperative | |||
| Atrial fibrillation (%) | 20.4 | 23.8 | 0.527 |
| Ventilation time (h) | 14.9 ± 12.3 | 14.2 ± 15.8 | 0.143 |
| ICU stay (days) | 3.4 ± 2.0 | 3.2 ± 1.8 | 0.393 |
| Hospital stay (days) | 21.5 ± 16.2 | 20.1 ± 11.5 | 0.794 |
| Stroke (%) | 0.6 | 4.4 | 0.037 |
| Hospital death (%) | 0.6 | 0.6 | 1.000 |
| Graft patency (%)d | 98.4 | 99.0 | 0.225 |