Table 2.
Baseline patient characteristics after propensity score matching.
| Characteristics | Matched cohort | ||
|---|---|---|---|
| Pericardial | Porcine | Abs. std. diff | |
| Number of procedures | N = 432 | N = 432 | |
| Procedure type | 0.023 | ||
| Valve | 207 (47.9%) | 212 (49.1%) | |
| CABG/valve | 225 (52.1%) | 220 (50.9%) | |
| Age in years, % by group | |||
| <60 years | 44 (10.2%) | 37 (8.6%) | 0.056 |
| 60–69 years | 102 (23.6%) | 115 (26.6%) | 0.069 |
| 70–79 years | 219 (50.7%) | 212 (49.1%) | 0.032 |
| ≥80 years | 67 (15.5%) | 68 (15.7%) | 0.006 |
| Mean | 71.4 (9.4) | 72.0 (8.9) | 0.059 |
| Female sex, % | 223 (51.6%) | 224 (51.9%) | 0.005 |
| Body surface area, % | |||
| <1.70 | 88 (20.4%) | 94 (21.8%) | 0.034 |
| 1.70–1.99 | 193 (44.7%) | 185 (42.8%) | 0.037 |
| ≥2.00 | 151 (35.0%) | 153 (35.4%) | 0.010 |
| Mean | 1.9 (0.2) | 1.9 (0.3) | 0.015 |
| Preoperative WBC >12,000 μ/L, % | 36 (8.3%) | 35 (8.1%) | 0.008 |
| Prior PCI, % | 51 (11.8%) | 53 (12.3%) | 0.014 |
| Prior CABG, % | 26 (6.0%) | 23 (5.3%) | 0.030 |
| Comorbid disease, % | |||
| Vascular disease | 99 (22.9%) | 104 (24.1%) | 0.027 |
| Diabetes | 117 (27.1%) | 116 (26.9%) | 0.005 |
| COPD | 106 (24.5%) | 105 (24.3%) | 0.005 |
| Atrial fibrillation | 172 (39.8%) | 175 (40.5%) | 0.014 |
| Congestive heart failure | 268 (62.0%) | 255 (59.0%) | 0.062 |
| Dialysis or creatinine ≥2 mg/dL | 26 (6.0%) | 23 (5.3%) | 0.030 |
| NYHA class 4 | 89 (20.6%) | 83 (19.2%) | 0.035 |
| Prior stroke | 29 (6.7%) | 34 (7.9%) | 0.044 |
| Ejection fraction, (%) | |||
| <40 | 40 (9.3%) | 37 (8.6%) | 0.024 |
| 40–49 | 63 (14.6%) | 57 (13.2%) | 0.040 |
| 50–59 | 75 (17.4%) | 90 (20.8%) | 0.088 |
| ≥60 | 207 (47.9%) | 196 (45.4%) | 0.051 |
| Missing | 47 (10.9%) | 52 (12.0%) | 0.036 |
| Mean | 55.9 (13.6) | 56.1 (12.2) | 0.021 |
| Coronary artery disease, % | 323 (74.8%) | 323 (74.8%) | <0.001 |
| Left main stenosis ≥50% | 41 (9.5%) | 43 (10.0%) | 0.016 |
| Number of diseased vessels | |||
| 1 | 55 (12.7%) | 55 (12.7%) | 0.005 |
| 2 | 237 (54.9%) | 236 (54.6%) | 0.021 |
| 3 | 53 (12.3%) | 56 (13.0%) | 0.012 |
| Valve only | 87 (20.1%) | 85 (19.7%) | <0.001 |
| Myocardial infarction ≤ 7 days | 22 (5.1%) | 32 (7.4%) | 0.096 |
| Valve disease, % | |||
| Stenosis or regurgitation | 332 (76.9%) | 341 (78.9%) | 0.050 |
| Stenosis and regurgitation | 100 (23.1%) | 91 (21.1%) | 0.050 |
| Priority at surgery, % | |||
| Elective | 242 (56.0%) | 239 (55.3%) | 0.014 |
| Urgent | 170 (39.4%) | 173 (40.0%) | 0.014 |
| Emergency | 20 (4.6%) | 20 (4.6%) | <0.001 |
COPD, chronic obstructive pulmonary disease; WBC, white blood cells; NYHA, New York Heart Association; ASD, absolute standard difference.