Table 2. Perioperative and postoperative complications.
| Characteristic | Overall | Low ePWV (<10.04 m/s) | High ePWV (≥10.04 m/s) | P |
|---|---|---|---|---|
| No. of patients | 8,570 | 4,301 | 4,269 | |
| Operation time, s | 4.00 (4.00, 5.00) | 4.00 (4.00, 5.00) | 4.00 (4.00, 5.00) | <0.001 |
| Number of bypass grafts | 2.03±0.48 | 2.04±0.48 | 2.02±0.48 | 0.01 |
| LIMA utilization | 5,119 (59.7) | 2,966 (69.0) | 2,153 (50.4) | <0.001 |
| RIMA utilization | 33 (0.4) | 21 (0.5) | 12 (0.3) | 0.12 |
| RA utilization | 63 (0.7) | 48 (1.1) | 15 (0.4) | <0.001 |
| SVG utilization | 8,299 (96.8) | 4,136 (96.2) | 4,163 (97.5) | <0.001 |
| PRBC transfusion, U | 0.12±0.59 | 0.09±0.50 | 0.15±0.66 | <0.001 |
| Plasma transfusion, mL | 16.1878±78.2028 | 14.9372±76.2775 | 17.4484±80.0859 | 0.14 |
| Platelet transfusion, U | 0.0023±0.1002 | 0.0021±0.0977 | 0.0026±0.1027 | 0.82 |
| Intraoperative blood loss, mL | 700 (600, 800) | 700 (600, 800) | 600 (600, 800) | <0.001 |
| Length of hospital stay, days | 13.9±5.8 | 14.0±5.9 | 13.9±5.6 | 0.63 |
| Postoperative awakening time, h | 6.4±10.6 | 6.0±11.4 | 6.7±9.7 | 0.002 |
| ICU stay duration, h | 37±49 | 36±48 | 37±49 | 0.25 |
| Organ hypoperfusion | 292 (3.4) | 122 (2.8) | 170 (4.0) | 0.003 |
| Cerebral hemorrhage | 9 (0.1) | 4 (0.1) | 5 (0.1) | 0.75 |
| Cerebral infarction | 198 (2.3) | 76 (1.8) | 122 (2.9) | <0.001 |
| Limbs motor dysfunction | 30 (0.4) | 14 (0.3) | 16 (0.4) | 0.70 |
| Reintubation | 56 (0.7) | 22 (0.5) | 34 (0.8) | 0.10 |
| Tracheotomy | 46 (0.5) | 23 (0.5) | 23 (0.5) | 0.98 |
| AKI | 32 (0.4) | 14 (0.3) | 18 (0.4) | 0.47 |
| Postoperative CRRT | 91 (1.1) | 43 (1.0) | 48 (1.1) | 0.57 |
| Postoperative myocardial infarction | 32 (0.4) | 13 (0.3) | 19 (0.4) | 0.28 |
| Postoperative atrial fibrillation | 680 (7.9) | 259 (6.0) | 421 (9.9) | <0.001 |
| Postoperative IABP | 480 (5.6) | 278 (6.5) | 202 (4.7) | <0.001 |
| Postoperative ECMO | 63 (0.7) | 34 (0.8) | 29 (0.7) | 0.55 |
| Pulmonary infection | 167 (1.9) | 77 (1.8) | 90 (2.1) | 0.29 |
| Pleural effusion | 1,938 (22.6) | 981 (22.8) | 957 (22.4) | 0.67 |
| Respiratory failure | 22 (0.3) | 12 (0.3) | 10 (0.2) | 0.68 |
| Postoperative hemorrhage | 39 (0.5) | 18 (0.4) | 21 (0.5) | 0.61 |
| Surgical debridement | 11 (0.1) | 4 (0.1) | 7 (0.2) | 0.36 |
| Sepsis (blood culture-proven infection) | 17 (0.2) | 9 (0.2) | 8 (0.2) | 0.82 |
| In-hospital mortality | 32 (0.4) | 15 (0.3) | 17 (0.4) | 0.71 |
Categorical variables are presented as n (%). Continuous variables are presented as mean ± standard deviation or median (interquartile range). AKI, acute kidney injury; CRRT, continuous renal replacement therapy; ECMO, extracorporeal membrane oxygenation; ePWV, estimated pulse wave velocity; IABP, intra-aortic balloon pump; ICU, intensive care unit; LIMA, left internal mammary artery; PRBC, packed red blood cell; RA, radial artery; RIMA, right internal mammary artery; SVG, saphenous vein graft.