Emergency Medicine · Surgery
Alvarado Score calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Result
0
Alvarado score 0–4
Appendicitis is less likely; reassess if symptoms persist or evolve.
Formula inputs
- Migration of pain to right lower quadrant (+1)
- Anorexia or acetone in urine (+1)
- Nausea or vomiting (+1)
- Right-lower-quadrant tenderness (+2)
- Rebound pain (+1)
- Temperature ≥37.3°C (+1)
- Leukocytosis >10,000/mm³ (+2)
- Neutrophil left shift >75% (+1)
Primary source
Alvarado A. A practical score for the early diagnosis of acute appendicitis. Ann Emerg Med (1986)
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