Preoperative status
| Valve type | p Value* | ||
|---|---|---|---|
| SB (n = 247) | MP (n = 145) | ||
| Values are percentages or mean (SEM). | |||
| *χ2 test or Mann-Whitney test. | |||
| BMI, body mass index; BSA, body surface area; CABG, coronary artery bypass grafting; MP, mechanical prosthesis; MI, myocardial infarction; NYHA, New York Heart Association; SB, Medtronic Freestyle stentless bioprosthesis. | |||
| Women | 50% | 34% | 0.002 |
| Age (years) | 76 (5) | 71 (4) | <0.001 |
| BSA (m2) | 1.82 (0.19) | 1.89 (0.19) | 0.002 |
| BMI (kg/m2) | 26 (4) | 27 (4) | 0.01 |
| CABG | 42% | 50% | 0.17 |
| Previous CABG | 1.6% | 4.1% | 0.18 |
| Emergency operation | 1.2% | 4.1% | 0.08 |
| Previous MI | 12% | 22% | 0.009 |
| Diabetes mellitus | 20% | 24% | 0.37 |
| Hypertension | 68% | 70% | 0.67 |
| Hyperlipidaemia | 44% | 44% | 1 |
| History of renal disease | 11% | 13% | 0.6 |
| NYHA class | 0.07 | ||
| I | 7% | 4% | |
| II | 33% | 28% | |
| III | 52% | 52% | |
| IV | 8% | 16% | |