Alvarado Score

Alvarado A. A practical score for the early diagnosis of acute appendicitis. The 8-item MANTRELS score; RLQ tenderness and leukocytosis are weighted 2 points.

Ohle R, O’Reilly F, O’Brien KK, Fahey T, Dimitrov BD. The Alvarado score for predicting acute appendicitis: a systematic review. Pooled analysis across 42 studies; a cut-off of 5 rules out appendicitis reasonably well, higher cut-offs rule it in less reliably.