Table 2. Baseline characteristics.
| Baseline parameter | Bioprosthetic group | Mechanical group | RR or WMD (95% CI) | Heterogeneity |
Overall P value | |
|---|---|---|---|---|---|---|
| I2 (%) | P value | |||||
| Age (years) | 68.1 | 62.9 | 7.30 (5.21, 9.40) | 71 | 0.0003 | <0.0001 |
| Males (%) | 62.8 | 60.7 | 1.06 (0.97, 1.17) | 11 | 0.35 | 0.21 |
| LVEF (%) | 51.1 | 53.1 | −4.14 (−10.86, 2.57) | 86 | <0.0001 | 0.23 |
| Hypertension (%) | 82.3 | 79.8 | 0.96 (0.86, 1.08) | 49 | 0.07 | 0.53 |
| Diabetes (%) | 34.4 | 29.9 | 1.08 (0.95, 1.22) | 0 | 0.56 | 0.26 |
| Chronic lung disease (%) | 7.6 | 3.2 | 1.62 (0.92, 2.84) | 39 | 0.16 | 0.09 |
| Prior MI (%) | 14.2 | 11.4 | 1.02 (0.81, 1.27) | 0 | 0.53 | 0.88 |
| Prior PCI/CABG (%) | 16.0 | 12.0 | 1.26 (1.01, 1.58) | 0 | 0.43 | 0.04 |
| Preoperative endocarditis (%) | 13.3 | 8.5 | 1.15 (0.91, 1.46) | 0 | 0.84 | 0.23 |
RR, relative risk; WMD, weighted mean difference; CI, confidence interval; LVEF, left ventricle ejection fraction; PCI, percutaneous coronary intervention; CABG, coronary artery bypass graft.