Alvarado score calculator
Alvarado Score
| Criteria | Points | No | Yes |
|---|---|---|---|
| Symptoms | |||
| Migration of pain to RLQ | +1 | 1 | |
| Anorexia | +1 | 1 | |
| Nausea/vomiting | +1 | ||
| Signs | |||
| Tenderness in RLQ | +2 | 1 | |
| Rebound pain | +1 | 1 | |
| Elevated temperature (≥37.3°C / 99.1°F) | +1 | 1 | |
| Labs | |||
| Leukocytosis (WBC >10,000/μL) | +2 | 1 | |
| Left shift (>75% neutrophils) | +1 | 1 | |
| Alvarado Score | / 10 | ||
| Interpretation | |
|---|---|
| 0–4 | Low risk — Appendicitis unlikely. Consider other diagnoses. |
| 5–6 | Equivocal — Consider CT imaging or observation with serial exams. |
| 7–8 | Probable appendicitis — Surgical consultation recommended. |
| 9–10 | Very probable appendicitis — Operative management almost certain. |