What physiologic variables are included in APACHE II?

APACHE II uses 12 variables scored 0 to 4 each: temperature, MAP, HR, RR, oxygenation (A-aDO2 or PaO2), arterial pH, serum sodium, serum potassium, serum creatinine, hematocrit, WBC, and GCS. Add age points (0 to 6) and chronic health points (2 to 5). Maximum 71. Score >25: approximately 50% predicted mortality.

Is APACHE II or SOFA better for ICU prognostication?

Both are widely used. APACHE II predicts overall ICU mortality but requires 24-hour admission data. SOFA tracks ongoing organ dysfunction and is better for serial monitoring and therapeutic response assessment. APACHE IV has greater discrimination than APACHE II but is more complex to calculate.

APACHE II Intensive Care Mortality Score

Calculate APACHE II (Acute Physiology and Chronic Health Evaluation II) score using 12 physiologic variables plus age and chronic health points to predict ICU mortality risk.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.

How to Use

Enter the values for the scenario you are assessing. Calculate APACHE II (Acute Physiology and Chronic Health Evaluation II) score using 12 physiologic variables plus age and chronic health points to predict ICU mortality risk. Use the apache ii score result to inform your calculation.

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