* Required

Apache II Score / Approximate Mortality Interpretation 

0-4: 4% non-op, 1% post-op     5-9: 8% non-op, 3% post-op   10-14: 15% non-op, 7% post-op   15-19: 24% non-op, 12% post-op   20-24: 40% non-op, 30% post-op   25-29: 55% non-op, 35% post-op   30-34: Approx 73% both  35-100: 85%    non-op, 88% post-op  


  • For the APACHE II score to be correct, a value must be selected for every variable.
  • The numbers in the parentheses represent the point value assigned to each clinical parameter above. The Apache Score is the sum of these points.
  • Chronic Dx includes biopsy proven cirrhosis and documented portal hypertension; past upper GI bleeding attributed to portal hypertension; prior hepatic failure; prior hepatic encephalopathy; NYHA class IV; chronic restrictive, obstructive, or vascular lung disease resulting in severe exercise restriction; documented hypoxemia or hypercapnia; secondary polycythemia; severe pulmonary hypertension (>40 mmHg); ventilator dependence; chronic hemodialysis.
  • Chronic Dx also includes immunosuppression from chemotherapy, radiation therapy, long-term or recent high-dose steroids, immunodeficiency (eg, leukemia, lymphoma, AIDS).


  1. Knaus WA, et al. APACHE II: a severity of disease classification system. Crit Care Med. 1985 Oct;13(10):818-29.
  2. Intensive Care Med. 2000 Dec;26(12):1779-85.Validation of severity scoring systems SAPS II and APACHE II in a single-center population. Capuzzo M1, Valpondi V, Sgarbi A, Bortolazzi S, Pavoni V, Gilli G, Candini G, Gritti G, Alvisi R.
  3. Cancer. 1992 Jul 15;70(2):497-503.Independent validation of APACHE II severity of illness score for predicting mortality in patients with breast cancer admitted to the intensive care unit. Headley J, Theriault R, Smith TL.

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