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| Parameters | Score |
| Male | 1.0 |
| Female | 0.5 |
| Age <40 years | 1.0 |
| Age >40 years | 0.5 |
| Pain-Right iliac fossa | 0.5 |
| Migratory pain | 0.5 |
| Anorexia | 1.0 |
| Nausea/Vomiting | 1.0 |
| Length of symptoms <48 hrs. | 1.0 |
| Length of symptoms >48 hrs. | 0.5 |
| Tenderness in right iliac fossa | 1.0 |
| Guarding in right iliac fossa | 2.0 |
| Rebound tenderness | 1.0 |
| Rovsing's sign | 2.0 |
| Elevated temperature | 1.0 |
| Raised WBC count | 1.0 |
| Unremarkable urinalysis | 1.0 |
| Foreign nationality | 1.0 |
| Total score | 17.5 |
