Comorbidity prevalence in the population of 588 patients and univariable analysis of prognostic factors
| Condition | Patients n (%) | Alive | Deaths | p-value |
| Chronic pulmonary disease | 90 (15.3) | 47 | 43 | 0.12 |
| Coronary artery disease | 75 (12.7) | 42 | 33 | 0.83 |
| Congestive heart failure | 12 (2) | 8 | 4 | 0.98 |
| Cerebrovascular disease | 25 (4.25) | 10 | 15 | 0.03 |
| Dementia | 2 (0.34) | 1 | 1 | 0.78 |
| Peripheral vascular disease | 79 (13.4) | 38 | 41 | 0.09 |
| Moderate-to-severe renal disease | 10 (1.7) | 5 | 5 | 0.86 |
| Connective tissue disease | 3 (0.5) | 1 | 2 | 0.003 |
| Mild liver disease | 1 (0.1) | 0 | 1 | 0.03 |
| Moderate-to-severe liver disease | 9 (1.5) | 1 | 8 | 0.001 |
| Peptic ulcer disease | 63 (10.7) | 37 | 26 | 0.86 |
| Any prior tumour within 5 yrs | 39 (6.6) | 17 | 22 | 0.02 |
| Leukaemia | 3 (0.5) | 2 | 1 | 0.94 |
| Lymphoma | 3 (0.5) | 3 | 0 | |
| Diabetes | 39 (6.63) | 21 | 18 | 0.72 |
| CCI 0, 1 or 2 | 534 (90.8) | 314 | 220 | 0.002 |
| CCI 3, 4 or 5 | 54 (9.1) | 22 | 32 |
Data presented as n (%) or n, unless otherwise stated. CCI: Charlson comorbidity index (CCI).