Comorbidity-Based Risk Categories of Kahn et al for Renal Replacement Therapy

Patient selection: renal disease requiring renal replacement therapy

Outcome: survival

Parameters:

(1) age in years

(2) number of comorbid conditions

(3) diabetes

(4) visceral malignancy

Comorbid conditions:

(1) angina

(2) previous myocardial infarction

(3) cardiac failure

(4) chronic obstructive airway disease

(5) pulmonary fibrosis

(6) cirrhosis or chronic hepatitis

(7) vascular disease (peripheral vascular, cerebrovascular disease)

High risk:

(1) age > 80 years

(2) >= 2 comorbid conditions (not including renal disease)

(3) visceral malignancy

(4) diabetes and cardiopulmonary disease

Low risk:

(1) < 70 years, no comorbid illness, no diabetes and no malignancy

Medium risk:

(1) anyone not low or high risk