Table 2.
Patient profiles after propensity score matching with the secondary model (25 parameters matched) and the primary model (35 parameters matched).
| Variable | Matched cohorts—secondary model | Matched cohorts—primary model | ||||||
|---|---|---|---|---|---|---|---|---|
| STS | DuraGraft | P | SMD (%) | STS | DuraGraft | p | SMD (%) | |
| No. of patients (N) | 2,522 | 2,522 | 2,400 | 2,400 | ||||
| Age | 67.0 ± 9.3 | 67.4 ± 9.2 | 0.251 | 3.2 | 67.3 ± 9.2 | 67.3 ± 9.8 | 0.989 | −0.0 |
| Male sex | 82.5% | 82.5% | 1.00 | <0.1 | 82.1% | 82.7% | 0.596 | −1.5 |
| Black race | 0.25% | 0.1% | 0.317 | −2.8 | 0.1% | 0.1% | 0.655 | 1.3 |
| BMI < 20 kg/m2 | 0.7% | 0.7% | 1.00 | <0.1 | 0.7% | 0.6% | 0.589 | 1.6 |
| Previous/current smoker | 63.4% | 62.1% | 0.351 | −2.6 | 61.9% | 63.4% | 0.283 | −3.1 |
| Diabetes—insulin | 13.3% | 14.5% | 0.222 | 3.4 | 14.6% | 13.8% | 0.408 | 2.4 |
| Diabetes—no insulin | 29.5% | 28.8% | 0.598 | −1.5 | 29.1% | 28.6% | 0.702 | 1.1 |
| CRF (Cr > 2.0 mg/dl) | 2.2% | 2.2% | 1.00 | <0.1 | 2.2% | 2.3% | 0.771 | −0.8 |
| Dialysis | 0.9% | 1.1% | 0.325 | 2.8 | 1.2% | 1.3% | 0.795 | −0.8 |
| PVD | 15.3% | 16.1% | 0.486 | 2.0 | 16.3% | 16.9% | 0.587 | −1.6 |
| PH | 8.0% | 8.2% | 0.877 | 0.4 | 8.6% | 8.3% | 0.677 | 1.2 |
| History of PD | 14.0% | 13.9% | 0.871 | −0.5 | 14.0% | 13.9% | 0.901 | 0.4 |
| History of CVA | 6.3% | 7.9% | 0.037 | 5.9 | 8.0% | 8.4% | 0.598 | −1.5 |
| MI ≤ 24 h | 1.3% | 1.4% | 0.712 | 1.0 | 1.4% | 0.9% | 0.107 | 4.7 |
| MI > 24 h | 42.5% | 41.4% | 0.441 | −2.2 | 41.9% | 41.0% | 0.538 | 1.8 |
| Unstable angina | 9.4% | 8.9% | 0.558 | −1.6 | 9.4% | 9.7% | 0.694 | −1.1 |
| Heart failure | 13.7% | 14.2% | 0.597 | 1.5 | 14.6% | 14.0% | 0.536 | 1.8 |
| Cardiogenic shock | 0.7% | 0.9% | 0.341 | 2.7 | 1.0% | 0.8% | 0.535 | 1.8 |
| Preop atrial fibrillation | 6.6% | 7.8% | 0.103 | 4.6 | 8.0% | 9.8% | 0.029 | −6.3 |
| Reoperation | 1.2% | 1.3% | 0.798 | 0.7 | 1.2% | 1.2% | 1.000 | 0.0 |
| Left main stem disease | 41.0% | 40.9% | 0.954 | −0.2 | 39.2% | 39.7% | 0.723 | −1.0 |
| Three-vessel disease | 81.9% | 81.2% | 0.537 | −1.7 | 80.7% | 81.1% | 0.713 | −1.1 |
| LVEF (<30%) | 2.4% | 3.1% | 0.167 | 3.90 | 3.2% | 3.3% | 0.870 | −0.5 |
| Status urgent | 23.9% | 24.1% | 0.895 | 0.4 | 25.1% | 25.5% | 0.791 | −0.8 |
| Status emergent | 1.4% | 1.3% | 0.904 | −0.3 | 1.4% | 1.1% | 0.367 | 2.6 |
| Previous CABGa | 1.2% | 0.3% | <0.001 | −10.4 | 0.3% | 0.3% | 0.796 | 0.7 |
| Previous PCIa | 30.5% | 24.6% | <0.001 | −13.2 | 24.9% | 24.5% | 0.763 | 0.9 |
| Intraoperative factors | ||||||||
| On-pump statusa | 89.1% | 82.9% | <0.001 | −17.8 | 83.8% | 84.9% | 0.284 | −3.1 |
| No distal anastomosesa | 3.4 ± 1.0 | 3.0 ± 0.9 | <0.001 | −44.5 | 3.0 ± 0.9 | 3.0 ± 1.1 | 0.507 | −1.9 |
| Use of LIMA grafta | 97.9% | 90.8% | <0.001 | −31.1 | 92.6% | 92.3% | 0.623 | 1.4 |
| No. of arterial graftsa | 1.1 ± 0.5 | 1.3 ± 0.7 | <0.001 | 22.3 | 1.3 ± 0.7 | 1.3 ± 0.8 | 0.805 | −0.7 |
| No. of venous graftsa | 2.2 ± 1.0 | 1.5 ± 0.9 | <0.001 | −72.8 | 1.5 ± 0.9 | 1.6 ± 0.9 | 0.809 | −0.7 |
| All-arterial graftsa | 2.8% | 10.4% | <0.001 | 31.2 | 10.6% | 10.8% | 0.852 | −0.5 |
| All venous graftsa | 2.1% | 5.3% | <0.001 | 16.8 | 4.9% | 5.1% | 0.791 | −0.8 |
| Endoscopic harvesta | 91.0% | 13.8% | <0.001 | −244.2 | 14.5% | 14.6% | 0.870 | −0.5 |
a
Parameters only included in the primary model.
CABG, coronary artery bypass grafting; CRF, case report form; LIMA, left internal mammary artery; CVA, cerebrovascular accident; LVEF, left ventricular ejection fraction; PCI, percutaneous coronary intervention; PD, pulmonary disease; PH, pulmonary hypertension; PVD, peripheral vascular disease; SMD, standard mean difference; STS, Society of Thoracic Surgeons.