Table 2.
Univariate analysis of intraoperative and postoperative variables of patients with or without PPCs
| Variables | None-PPCs group n = 157, (%) |
PPCs group n = 148, (%) |
P-value |
|---|---|---|---|
| Anesthesia method | 0.126 | ||
| Intravenous anesthesia | 84 (53.5) | 92 (62.2) | |
| Intravenous combined with respiration | 73 (46.5) | 56 (37.8) | |
| Duration of operation (hour) | 3.80 (3.28, 4.43) | 4.00 (3.43, 4.48) | 0.025 |
| Duration of anesthesia (hour) | 5.15 (4.59, 5.69) | 5.37 (4.69, 6.16) | 0.017 |
| Net intraoperative fluid infusion volume (ml) | 1365 (900, 1960) | 1400 (900, 2068) | 0.788 |
| Total amount of intraoperative fluids (ml) | 3400 (2835, 3844) | 3200 (2800, 3900) | 0.415 |
| Intraoperative blood loss(ml) | 400 (280, 600) | 500 (300, 600) | 0.063 |
| Intraoperative blood transfusion | 43 (27.4) | 54 (36.5) | 0.088 |
| CPB | 3 (1.9) | 11 (7.4) | 0.021 |
| Number of bypass grafts | 0.101 | ||
| < 4 | 74 (47.1) | 56 (37.8) | |
| ≥ 4 | 83 (52.9) | 92 (62.2) | |
| Application of LIMA | 106 (67.5) | 106 (71.6) | 0.436 |
| Small-incision surgery | 12 (7.6) | 6 (4.1) | 0.184 |
| Postoperative albumin (g/L) | 35.72 ± 4.99 | 34.05 ± 5.95 | 0.009 |
Note: PPCs, postoperative pulmonary complications; CPB, Cardiopulmonary bypass; LIMA, left internal mammary artery