Appendicitis Inflammatory Response (AIR) Score
Appendicitis Inflammatory Response (AIR) score (Andersson 2008): vomiting, right-iliac-fossa pain, rebound-tenderness grade, fever, and WBC/PMN/CRP bands give a 0–12 score (low 0–4, indeterminate 5–8, high 9–12).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Vomiting
- Yes
- Right-iliac-fossa pain
- Yes
- Rebound tenderness / defense
- Medium (2)
- Temperature ≥ 38.5 °C
- Yes
- WBC
- 16 ×10⁹/L
- Neutrophil percentage
- 86 %
- CRP
- 60 mg/L
Result: AIR score 11 — high probability of appendicitis (9-12).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- 0-4
- Low probability of appendicitis.
- 5-8
- Indeterminate.
- 9-12
- High probability. Vomiting, RIF pain, rebound, fever, WBC/PMN/CRP bands. A risk score, not a surgery order.
What you enter
- Vomiting (+1)
- Right-iliac-fossa pain (+1)
- Rebound tenderness / defense
- Temperature ≥ 38.5 °C (+1)
- WBC
- Neutrophil percentage
- CRP
How this is calculated
Andersson M, Andersson RE. The appendicitis inflammatory response score: a tool for the diagnosis of acute appendicitis that outperforms the Alvarado score. World J Surg. 2008;32(8):1843-1849. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.