Table 2.
Patient demographic and preoperative characteristics categorized by age.
| Characteristic | Full sample | Age category | ||
|---|---|---|---|---|
| ≤49 y | 50–60 y | ≥60 y | ||
| Comorbidity Charlson index (%) | ||||
| 0–2 | 63.49 | 64.29 | 40.35 | 58.37 |
| ≥3 | 36.51 | 35.71 | 59.65 | 41.63 |
| Comorbidity (%) | ||||
| Myocardial infarction | 2.30 | 2.38 | 2.10 | 2.63 |
| Congestive heart failure | 5.23 | 7.14 | 3.78 | 6.14 |
| Peripheral vascular disease | 1.05 | 0.79 | 0.84 | 1.75 |
| Cerebrovascular accident | 3.97 | 3.17 | 5.04 | 2.63 |
| Chronic obstructive pulmonary disease | 7.95 | 3.17 | 6.72 | 15.79 |
| Peripheral vascular disease | 2.72 | 2.38 | 2.94 | 2.63 |
| Liver disease | 0.84 | 0.79 | 0.84 | 0.88 |
| Diabetes mellitus | 16.74 | 13.49 | 9.24 | 35.96 |
| Solid tumor | 14.44 | 9.52 | 14.71 | 19.30 |
| Solid tumor metastatic | 1.67 | 1.59 | 1.68 | 1.75 |
| AIDS | 2.09 | 0.79 | 2.94 | 1.75 |
| Hypertension arterial | 36.19 | 26.98 | 39.08 | 40.35 |
| Kidney transplant | 4.81 | 5.56 | 5.88 | 1.75 |
| Observations | 478 | 126 | 238 | 114 |