Table 1. Charlson Comorbidity Index scoring system.

Condition	Score
Myocardial infarct*	1
Congestive heart failure	1
Peripheral vascular disease	1
Cerebrovascular disease	1
Dementia	1
Chronic pulmonary disease	1
Connective tissue disease	1
Ulcer disease	1
Mild renal disease	1
Mild liver disease	1
Diabetes without end-organ damage	1
Hemiplegia	2
Moderate to severe renal disease	2
Diabetes with end-organ damage	2
Any tumor or prior history of tumor†	2
Leukemia	2
Lymphoma	2
Moderate to severe liver disease	3
Metastatic solid tumor	6
Acquired immunodeficiency virus	6

Note: A score >5 has been associated with significantly worse mortality rates.

^*Myocardial infarction includes coronary artery bypass graft, percutaneous transluminal coronary angioplasty, and angina pectoris.

^†Except basal cell carcinoma.