List of comorbidities in each group using Charlson Index
| Comorbidities % | Group 1 | Group 2 | Group 3 |
| Peripheral vascular disease | 7 | 7 | 10 |
| Cerebrovascular accident | 1 | 0 | 0 |
| Congestive heart failure | 10 | 17 | 7 |
| Coronary artery disease | 23 | 14 | 21 |
| Chronic renal failure | 5 | 0 | 0 |
| Myocardial infarction | 5 | 2 | 0 |
| Dementia | 3 | 2 | 0 |
| Connective tissue disease | 4 | 0 | 0 |
| Peptic ulcer disease | 6 | 2 | 0 |
| Diabetes mellitus | 16 | 7 | 7 |
| Liver disease | 2 | 0 | 0 |
| Malignancies | 17 | 29 | 12 |
| Severe liver disease | 0 | 0 | 0 |
| Total | 2.13 | 1.76 | 1.66 |
| Total (age-adjusted) | 4.29 | 4.14 | 4.19 |