Table 1.

Calculation of Classical and Modified Charlson Comorbidity Index Scores and Age-Adjusted Scores

Comorbid Conditions	CCI Score	Modified CCI Score
Age
<40	+0	−
<50	−	+0
41-50	+1	−
50-59	−	+1
51-60	+2	−
60-69	−	+2
61-70	+3	−
70-79	−	+3
≥71	+4	−
>80	−	+4
Myocardial infarction	1	0
Congestive heart failure	1	2
Peripheral vascular disease	1	0
Cerebrovascular disease	1	0
Dementia	1	2
Chronic pulmonary disease	1	1
Rheumatic disease	1	1
Peptic ulcer disease	1	0
Mild liver disease	1	2
Diabetes without chronic complication	1	0
Diabetes with chronic complication	2	1
Hemiplegia	2	2
Renal disease	2	1
Any malignancy without metastasis	2	2
Leukemia	2
Lymphoma	2
Moderate or severe liver disease*	3	4
Metastatic solid tumor	6	6
AIDS (exclude asymptomatic infection)**	6	4
Max. comorbidity score	33	24
Max. age-adjusted comorbidity score	37	28

*Liver disease: mild, chronic hepatitis or cirrhosis without portal hypertension; moderate, cirrhosis, portal hypertension; severe, portal hypertension, history of variceal bleeding.

**AIDS: current CD4 count <200, opportunistic infection in the last 1 month, active AIDS such as Kaposi sarcoma.

AIDS, acquired immunodeficiency syndrome.