Table 2. Demographic and preoperative data of patients.
| Preoperative variables | Death group (n = 23) | Survival group (n = 169) | t/χ2 | P value |
|---|---|---|---|---|
| Age (years) | 60.9 ± 10.5 | 52.3 ± 11.2 | 3.494 | 0.001 |
| Female, n (%) | 6 (26.1) | 47 (27.8) | 0.030 | 0.862 |
| Body mass index (kg/m2) | 25.1 ± 1.4 | 24.6 ± 1.5 | 1.539 | 0.125 |
| Hypertension, n (%) | 15 (65.2) | 123 (72.8) | 0.573 | 0.449 |
| Diabetes n (%) | 2 (8.7) | 12 (7.1) | 0.076 | 0.783 |
| Chronic obstructive pulmonary disease, n (%) | 2 (8.7) | 14 (8.3) | 0.004 | 0.947 |
| Smoking, n (%) | 7 (30.4) | 41 (24.3) | 0.412 | 0.521 |
| CAD history, n (%) | 3 (13.0) | 9 (5.3) | 2.058 | 0.151 |
| Marfan’s syndrome, n (%) | 1 (4.3) | 5 (3.0) | 0.129 | 0.719 |
| Cardiac surgery history, n (%) | 1 (4.3) | 9 (5.3) | 0.039 | 0.843 |
| LVEF (%) | 54.3 ± 3.0 | 55.4 ± 2.8 | 1.615 | 0.108 |
| Preoperative serum creatinine (μmol/L) | 103.2 ± 19.0 | 97.2 ± 13.5 | 1.888 | 0.060 |
| Pericardial tamponade/shock, n (%) | 4 (17.4) | 10 (5.9) | 3.943 | 0.047 |
| MPS, n (%) | 10 (43.5) | 39 (23.1) | 4.433 | 0.035 |
| Emergency operation, n (%) | 21 (91.3) | 159 (94.1) | 0.267 | 0.606 |
CAD: coronary artery disease; LVEF: left ventricular ejection fraction; MPS: malperfusion syndrome