Table 1:
Demographic data for patients
| CABG and valve (N = 1705) | CABG only (N = 9412) | Valve only (N = 2919) | Total (N = 14 036) | Missing data [n (%)] | |
|---|---|---|---|---|---|
| Male [n (%)] | 1161 (68.0) | 7582 (80.6) | 1531 (52.4) | 10 274 (73.2) | 0 (0.0) |
| Age (years ± SD) | 71.3 ± 8.1 | 65.1 ± 9.2 | 64.6 ± 13.3 | 65.7 ± 10.3 | 0 (0.0) |
| BMI (kg/m2 ± SD) | 27.6 ± 4.6 | 28.6 ± 4.5 | 27.1 ± 5.2 | 28.2 ± 4.7 | 19 (0.1) |
| Preoperative creatinine (μmol/l ± SD) | 107.5 ± 56.3 | 100.0 ± 49.4 | 102.6 ± 65.6 | 101.5 ± 54.0 | 0 (0.0) |
| Renal failure [n (%)] | |||||
| ARI | 13 (0.8) | 29 (0.3) | 44 (1.5) | 86 (0.6) | 11 (0.1) |
| CRI | 137 (8.0) | 426 (4.5) | 154 (5.3) | 717 (5.1) | |
| CRF | 13 (0.8) | 46 (0.5) | 29 (1.0) | 88 (0.6) | |
| Ejection fraction [n (%)] | |||||
| Good | 1034 (60.7) | 5659 (60.1) | 2033 (69.8) | 8726 (62.2) | 7 (0.05) |
| Moderate | 473 (27.8) | 2882 (30.6) | 680 (23.3) | 4035 (28.8) | |
| Poor | 191 (11.2) | 829 (8.8) | 151 (5.2) | 1171 (8.3) | |
| Atrial fibrillation [n (%)] | 309 (18.1) | 325 (3.5) | 728 (25.0) | 1362 (9.7) | 18 (0.1) |
| NYHA class [n (%)] | |||||
| I | 173 (10.2) | 2868 (30.5) | 381 (13.1) | 3422 (24.4) | 4 (0.03) |
| II | 572 (33.6) | 4169 (44.3) | 813 (27.9) | 5554 (39.6) | |
| III | 838 (49.2) | 2246 (23.9) | 1427 (48.9) | 4511 (32.1) | |
| IV | 121 (7.1) | 127 (1.4) | 297 (10.2) | 545 (3.9) | |
| CCS class [n (%)] | |||||
| I | 518 (30.4) | 636 (6.8) | 182 (6.2) | 960 (6.8) | 3 (0.03) |
| II | 142 (8.3) | 2668 (28.4) | 291 (10.0) | 3396 (24.2) | |
| III | 437 (25.6) | 3467 (36.8) | 131 (4.5) | 4035 (28.8) | |
| IV | 437 (25.6) | 1604 (17.0) | 31 (1.1) | 1766 (12.6) | |
| Unstable angina [n (%)] | 184 (10.8) | 1977 (21.0) | 39 (1.3) | 2200 (15.7) | 9 (0.06) |
| Chronic airways disease [n (%)] | 195 (11.4) | 705 (7.5) | 253 (8.7) | 1153 (8.2) | 0 (0.0) |
| PVD [n (%)] | 257 (15.1) | 1345 (14.3) | 173 (5.9) | 1775 (12.6) | 0 (0.0) |
| Diabetes mellitus [n (%)] | |||||
| Diet controlled | 89 (5.2) | 423 (4.5) | 89 (3.1) | 601 (4.3) | 3 (0.03) |
| Oral meds | 186 (10.9) | 1144 (12.2) | 194 (6.6) | 1524 (10.9) | |
| Insulin | 79 (4.6) | 614 (6.5) | 67 (2.3) | 760 (5.4) | |
| Coronary artery disease extent [n (%)] | |||||
| 1 vessel | 573 (33.8) | 317 (3.4) | 104 (21.8) | 994 (8.6) | 0 (0.0) |
| 2 vessels | 492 (29.0) | 1835 (19.5) | 9 (1.9) | 2336 (20.2) | |
| 3 vessels | 631 (37.2) | 7250 (77.1) | 38 (8.6) | 7919 (68.4) | |
| Preop IABP [n (%)] | 31 (1.8) | 170 (1.8) | 17 (0.8) | 218 (1.5) | 0 (0.0) |
| Preop shock [n (%)] | 14 (0.8) | 28 (0.3) | 29 (1.0) | 71 (0.5) | 0 (0.0) |
| Hypertension [n (%)] | 1040 (61.0) | 6103 (64.8) | 1233 (42.2) | 8376 (59.7) | 0 (0.0) |
| Left main stem disease [n (%)] | 192 (11.3) | 2244 (23.8) | 5 (0.2) | 2441 (17.4) | 0 (0.0) |
| Q-wave MI [n (%)] | 139 (8.2) | 1198 (12.7) | 19 (0.7) | 1356 (9.7) | 0 (0.0) |
| First operation [n (%)] | 1634 (95.8) | 9255 (98.3) | 2605 (89.2) | 13 494 (96.1) | 0 (0.0) |
| Status [n (%)] | |||||
| Urgent | 255 (14.9) | 1762 (18.7) | 320 (11.) | 2337 (16.7) | 1 (0.0) |
| Emergent/salvage | 15 (0.8) | 112 (1.1) | 57 (2.0) | 184 (1.3) | |
| Endocarditis [n (%)] | 14 (0.8) | 0 (0.0) | 121 (4.1) | 135 (1.0) | 0 (0.0) |
| Smoking [n (%)] | |||||
| Current | 164 (9.6) | 1287 (13.7) | 335 (11.5) | 1786 (12.7) | 10 (0.06) |
| Ex-smoker | 1013 (59.4) | 5434 (57.8) | 1289 (44.2) | 7736 (55.2) | |
| Cerebrovascular disease [n (%)] | 173 (10.1) | 702 (7.5) | 250 (8.6) | 1125 (8.0) | 0 (0.0) |
| Ventilation preop [n (%)] | 7 (0.4) | 12 (0.1) | 25 (0.9) | 44 (0.3) | 0 (0.0) |
| Inotropes preop [n (%)] | |||||
| 1 | 88 (5.9) | 283 (3.4) | 138 (5.3) | 509 (4.1) | 1622 (11.6) |
| 2 | 50 (3.4) | 103 (1.2) | 65 (2.4) | 218 (1.8) | |
| ≥3 | 25 (1.6) | 23 (0.3) | 25 (0.9) | 62 (0.4) | |
| FEV1, (% predicted ± SD) | 78.8 ± 27.2 | 82.6 ± 28.3 | 77.7 ± 27.1 | 86.3 ± 19.7 | 840 (6.0) |
| Reoperation [n (%)] | 17 (1.0) | 37 (0.4) | 6 (0.2) | 60 (0.4) | 0 (0.0) |
| DSWI [n (%)] | 31 (1.8) | 90 (1.0) | 14 (0.5) | 135 (1.0) | 0 (0.0) |
ARI: acute renal injury; BMI: body mass index; CCS: Canadian cardiovascular society; CRF: chronic renal failure; CRI: chronic renal injury; FEV1: forced expiratory volume in 1 second; IABP: intra-aortic balloon pump; MI: myocardial infarction; NYHA: New York Heart Association; PVD: peripheral vascular disease; SD: standard deviation.