How does APACHE IV improve on APACHE II?

APACHE IV uses 142 variables including diagnosis-specific acute physiology weights, ICU admission location, and worst values in first 24 hours. It provides AUROC 0.88 vs 0.85 for APACHE II for hospital mortality prediction and also estimates ICU LOS and ventilator days, enabling benchmarking against peer ICUs.

What APACHE IV data is required?

APACHE IV requires: demographic data (age, weight, height), source of ICU admission, elective surgery status, chronic health conditions, primary ICU diagnosis from structured list, and 142 physiologic variables (worst values first 24h including temperature, HR, SBP, MAP, RR, PaO2, FiO2, SpO2, GCS, urine output, labs).

APACHE IV ICU Mortality Prediction Calculator

Calculate APACHE IV mortality prediction using 142 variables across physiology, diagnosis, chronic conditions, and ICU admission source for superior discrimination over APACHE II.

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Frequently Asked Questions

How does APACHE IV improve on APACHE II?

What APACHE IV data is required?