MDCalc

Appendicitis Inflammatory Response (AIR) Score

Diagnoses appendicitis based on clinical and laboratory findings.

Use in pediatric or adult patients with suspected appendicitis (large external validation cohort included ages 2-96 years).

Vomiting
RIF pain
Rebound tenderness
Temp ≥101.3ºF (38.5ºC)
Polymorphonuclear leukocytes
WBC count, ×10⁹/L
CRP level, mg/L

Result:

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Advice

For patients with an indeterminate AIR Score, clinician judgment should prevail.