<unk>  ("Acute Physiology and Chronic Health Evaluation<unk> ") is a severity-of-disease classification system, one of several ICU scoring systems. It is applied within 24 hours of admission of a patient to an intensive care unit (ICU): an integer score from 0 to 71 is computed based on several measurements; higher scores correspond to more severe disease and a higher risk of death. The first<unk>  model was presented by Knaus et al. in 1981.
APACHE II
Four Score
SIRS
Prati criteria
Nugent score
Ruedi–Allgower classification
Alvarado score
FLACC scale