Table 3. Comparison of postoperative variables.
| Variables | Total (n=582) | PMV (n=259) | Non-PMV (n=323) | P valuea |
|---|---|---|---|---|
| Drainage volume 24 h after surgery (mL) | 570.0 (315.0, 1,000.0) | 700.0 (350.0, 1,300.0) | 500.0 (300.0, 820.0) | <0.001 |
| Re-exploration for bleeding (%) | 25 (4.3) | 9 (3.5) | 16 (5.0) | 0.382 |
| Dialysis (%) | 96 (16.5) | 68 (26.3) | 28 (8.7) | <0.001 |
| Stroke (%) | 49 (8.4) | 21 (8.1) | 28 (8.7) | 0.809 |
| Paraplegia (%) | 17 (2.9) | 10 (3.9) | 7 (2.2) | 0.228 |
| Deep sternal wound infection (%) | 9 (1.5) | 5 (1.9) | 4 (1.2) | 0.521 |
| 30-day mortality (%) | 71 (12.2) | 47 (18.1) | 24 (7.4) | <0.001 |
| ICU stay time (day) | 5.0 (3.0, 8.0) | 8.0 (6.0, 13.0) | 4.0 (3.0, 5.0) | <0.001 |
| Hospital stay time (day) | 22.7±12.2 | 24.6±13.5 | 21.1±10.9 | <0.001 |
Data presented as n (%); median (IQR). a, P values indicate differences between PMV and Non-PMV groups. P<0.05 was considered statistically significant. PMV, prolonged mechanical ventilation; ICU, intensive care unit.