Table 2.
Unmatched intraoperative data.
| Variable | Off-pump (n = 307) |
On-pump (n = 397) |
P value |
|---|---|---|---|
| LIMA usage | 307 (100) | 397 (100) | 1.00 |
| RIMA usage | 122 (39.7) | 61 (15.4) | <0.01 |
| SVG usage | 185 (60.3) | 336 (84.6) | <0.01 |
| Grafts/patient | 2.91 ± 1.06 | 3.4 ± 0.4 | <0.01 |
| CPB time (min) | — | 79.7 ± 35.2 | — |
| Aortic cross-clamp time (min) | — | 49.4 ± 29.5 | |
| Conversion to CPB | 3 (0.9) | — | — |
| ICOR | 1.09 ± 0.17 | 1.11 ± 0.19 | 0.87 |
Values in parentheses are percentages.
CPB: cardiopulmonary bypass; ICOR: index of completeness of revascularization; LIMA: left internal mammary artery; RIMA: right internal mammary artery; SVG: saphenous vein graft.