Table 1: Charlson Index of comorbidity [8].

Clinical condition Weight
50-60 years old 1
Myocardal infarction 1
Congestive heart failure 1
Peripheral vascular disease 1
Cerebrovascular disease 1
Dementia 1
Chronic obstructive pulmonary disease 1
Connective tissue disease 1
Ulcer disease 1
Mild liver disease 1
Slight Diabetes without complication 1
61-70 years old 2
Hemiplegia 2
Moderate to severe renal disease 2
Diabetes with en-organ damage 2
Tumors 2
Leukemia 2
Lymphoma 2
71-80 years old 3
Moderate to severe liver disease 3
Up to 90-years-old 6
Metastatic solid tumor 6
Acquired immunodeficiency syndrome 6