Table 5.
Diagnostic characteristics of the AIR score and Alvarado score according to the cutoff points
| AIR score | Alvarado score | |||
|---|---|---|---|---|
| Diagnostic value | >4 points | >8 points | >4 points | >8 points |
| All appendicitis | ||||
| Sensitivity | 0.93 | 0.10 | 0.90 | 0.29 |
| Specificity | 0.85 | 1.00 | 0.55 | 0.95 |
| PV+ | 0.79 | 1.00 | 0.53 | 0.77 |
| PV– | 0.95 | 0.66 | 0.90 | 0.70 |
| Advanced appendicitis | ||||
| Sensitivity | 0.93 | 0.24 | 0.92 | 0.35 |
| Specificity | 0.85 | 1.00 | 0.55 | 0.95 |
| PV+ | 0.52 | 1.00 | 0.26 | 0.55 |
| PV– | 0.99 | 0.88 | 0.98 | 0.90 |
PV+ positive predictive value, PV− negative predictive value