Table 1.

Age-adjusted Charlson comorbidity index.

Point	Comorbidity
1	Myocardial infarction, heart failure, peripheral vascular disease, cerebrovascular disease, dementia, chronic pulmonary disease, connective tissue disorder, peptic ulcer disease, mild liver disease, diabetes mellitus without complications
2	Diabetes mellitus with complications, moderate-to-severe renal disease, hemiplegia, leukemia, lymphoma, tumor without metastases
3	Moderate-to-severe liver disease
6	Metastatic solid tumors, acquired immunodeficiency syndrome
1	For each decade over the age of 40 years