Table 1.
The Charlson comorbidity index (CCI)[12]
| Weight1 | Comorbid condition |
| 1 | Myocardial infarction |
| Congestive heart failure | |
| Peripheral vascular disease | |
| Cerebrovascular disease (except hemiplegia) | |
| Dementia | |
| Chronic obstructive pulmonary disease | |
| Connective tissue disease | |
| Peptic ulcer disease | |
| Mild liver disease | |
| Diabetes (without complications) | |
| 2 | Hemiplegia |
| Moderate or severe renal disease | |
| Diabetes with end-organ damage (retinopathy, neuropathy, etc) | |
| Any second solid tumor (nonmetastatic), leukemia or lymphoma | |
| 3 | Moderate or severe liver disease |
| 6 | Metastatic solid tumor |
| AIDS |
1
Optionally, the age index leads to adding 1 point for each decade over 40 years.