Table 3.
Characteristics of 9 patients with very low pARC scores who were diagnosed with appendicitis
| Case number | Age (y) | Sex | Duration of pain (h) | Walking | Migration | Maximal tenderness in the RLQ | Guarding | WBC (ANC) | Perforation | Missed appendicitis | pARC score*, % |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 13 | F | <24 | No | Yes | Yes | No | 7.1 (3.4) | No | Yes | 2.1 |
| 2 | 19 | M | <24 | Yes | No | No | No | 5.0 (3.0) | No | No | 3.6 |
| 3 | 16 | F | 48–120 | Yes | Yes | Yes | No | 5.6 (2.1) | No | No | 3.4 |
| 4 | 7 | M | 48–120 | No | No | No | No | 6.5 (5.7) | No | No | 2.3 |
| 5 | 17 | F | <24 | No | Yes | No | No | 6.9 (3.9) | No | No | 0.9 |
| 6 | 19 | F | <24 | Yes | No | No | No | 8.8 (6.3) | No | No | 4.0 |
| 7 | 12 | M | <24 | No | No | No | No | 7.0 (4.3) | No | Yes | 2.2 |
| 8 | 20 | F | 48–120 | No | Yes | Yes | Yes | 7.1 (3.3) | No | No | 4.3 |
| 9 | 8 | F | <24 | No | No | No | No | 9.4 (7.2) | No | No | 3.7 |
ANC = absolute neutrophil count, pARC = pediatric appendicitis risk calculator, RLQ = right lower quadrant, WBC = white blood cell count
*
Predicted probability of appendicitis