Vomiting

No vomiting+0Vomiting present (+1 pt)+1

Pain in Right Iliac Fossa

No RIF pain+0RIF pain present (+1 pt)+1

Rebound Tenderness or Muscular Guarding

No rebound tenderness or guarding+0Mild rebound tenderness or guarding (+1 pt)+1Moderate rebound tenderness or guarding (+2 pts)+2Strong rebound tenderness or guarding (+3 pts)+3

Body Temperature > 38.5°C (101.3°F)

Temperature ≤ 38.5°C (not febrile)+0Temperature > 38.5°C (+1 pt)+1

Polymorphonuclear (PMN) Leukocyte Proportion

< 70% PMN+070–84% PMN (+1 pt)+1≥ 85% PMN (+2 pts)+2

WBC Count

< 10.0 × 10⁹/L (normal)+010.0–14.9 × 10⁹/L (mildly elevated, +1 pt)+1≥ 15.0 × 10⁹/L (significantly elevated, +2 pts)+2

CRP (C-Reactive Protein)

< 10 mg/L (normal)+010–49 mg/L (mildly elevated, +1 pt)+150–83 mg/L (moderately elevated, +2 pts)+2≥ 84 mg/L (significantly elevated, +3 pts)+3

AIR Score for Acute Appendicitis

AIR Score for Acute Appendicitis