Understanding APACHEII scoring & Counting

1. STANDARDIZED
MORTALITY RATIO
Israt sadia
MBBS, Mphil.
Infection Control Departement
Labaid hospital

2. Standardized Mortality Ratio
• It is the ratio of the Observed or actual mortality and the
predicted mortality for a specified time period.
• It requires an estimate of predicted mortality rate using a
scoring system like APACHE, SOFA, SAPS,MPM or PRISM.
• Actual death in ICU/ Predicted deaths in ICU x100 =
• SMR < 1.0 indicates there were fewer than expected
deaths in the study population
• SMR = 1.0 indicates the number of observed deaths
equals the number of expected deaths in the study
population
• SMR >1.0 indicates there were more than expected
deaths in the study population (excess deaths)

3. APACHE score
•Acute Physiologic Assessment and Chronic
Health Evaluation II (APACHE II) score
introduced in 1985.
•https://www.mdcalc.com/apache-ii-score#evidence

6. •APACHE II Score ≥ 20 in 1 patient = 1 predicted
death