Patient characteristics
| Characteristic | No. (%) of patients* n = 2595 |
|---|---|
| Age, yr, median (IQR) | 60 (46–73) |
| Sex, male | 1324 (51) |
| Comorbidities | |
| Diabetes | 352 (14) |
| Congestive heart failure | 85 (3) |
| Coronary artery disease | 188 (7) |
| Hypertension | 639 (25) |
| Current dialysis | 54 (2) |
| Cirrhosis | 41 (2) |
| Metastatic cancer | 159 (6) |
| Current smoker | 296 (11) |
| ASA classification at first surgery | |
| 1 | 143 (6) |
| 2 | 464 (18) |
| 3 | 779 (30) |
| 4 | 582 (22) |
| 5 | 94 (4) |
ASA = American Society of Anesthesiologists; IQR = interquartile range.
↵* Unless indicated otherwise.