Table 2:
Intraoperative characteristics, stratified by age
| Preoperative variables | Age <80 years | Age ≥80 years | P |
|---|---|---|---|
| Total number of patients (%) | 2259 (80.97) | 531 (19.03) | - |
| Cardiopulmonary bypass time (min) | – | – | 0.008 |
| ≤ 80 | 610 (27) | 172 (32.4) | – |
| 81–120 | 1160 (51.3) | 271 (51.0) | – |
| > 120 | 488 (21.6) | 88 (16.6) | – |
| Aortic cross-clamp time (min) | – | – | 0.002 |
| ≤ 60 | 642 (28.4) | 188 (35.4) | – |
| 61–90 | 1088 (48.2) | 244 (46.0) | – |
| > 90 | 529 (23.4) | 98 (18.5) | – |
| Type of prosthesis | – | – | <0.001 |
| Bioprosthesis | 1352 (59.9) | 492 (92.7) | – |
| Mechanical valve | 831 (36.8) | 14 (2.6) | – |
| Homograft | 20 (0.9) | 2 (0.4) | – |
| Valve size (mean ± SD) | 23.44 (2.23) | 22.40 (2.38) | <0.001 |