Results of univariate analysis comparing patients who did and did not experience a complication
| Variable | No. (%) of patients* | p value | |
|---|---|---|---|
| Patients without complications n = 1729 | Patients with complications n= 866 | ||
| Age, median (IQR), yr | 57 (44–71) | 65 (51–77) | < 0.001 |
| Male sex | 869 (50) | 443 (51) | 0.73 |
| Transfer from another centre | 99 (8) | 77 (14) | < 0.001 |
| Any comorbidity | 814 (47) | 468 (54) | 0.001 |
| Diabetes | 227 (13) | 125 (14) | 0.36 |
| Congestive heart failure | 39 (2) | 46 (5) | < 0.001 |
| Coronary artery disease | 100(6) | 88 (10) | < 0.001 |
| Hypertension | 391 (23) | 248 (29) | 0.001 |
| Current dialysis | 27 (2) | 27 (3) | 0.009 |
| Cirrhosis | 21 (1) | 20 (2) | 0.035 |
| Metastatic cancer | 89 (5) | 70 (8) | 0.003 |
| Current smoker | 205(12) | 91 (11) | 0.31 |
| ASA score at first operation, median (IQR) | 3 (2–4) | 3 (3–4) | < 0.001 |
| Urgency of operation, h | |||
| < 2 | 227 (15) | 149 (23) | < 0.001 |
| 2–8 | 644 (43) | 238 (37) | — |
| < 24 | 381 (25) | 161 (25) | — |
| < 48 | 248 (17) | 93 (15) | — |
| Mortality | 102 (6) | 104 (12) | < 0.001 |
ASA = American Society of Anesthesiologists; IQR = interquartile range.
↵* Unless indicated otherwise.