| Signs in favor of appendicitis diagnosis | Signs against diagnosis of appendicitis | ||
| Male | +2 | Female | −1 |
| Age ≥ 50 ans | +3 | Age 20 - 39 ans | −1 |
| Duration of symptoms | Duration of symptoms | ||
| 36 hours | +2 | 3 days or plus | −3 |
| 48 hours | +1 | Right rectal mass | −3 |
| Existence of defense | +3 | No defense | −3 |
| Leukocytosis > 13 G/l | +2 | Leukocytosis < 10 G/L | −3 |
| Genito-urinary Signs | −3 | ||
| Global Score: arithmetical sum of points per item. When item values are not described, the number of points awarded is nil. | |||