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| Cut-off value | Sensitivity (%) | Specificity (%) | |
|---|---|---|---|
| FeNO (ppb) | >7.5 | 86.4 | 47.7 |
| Serum IgE (kU/L) | >86.1 | 83.2 | 71.5 |
| Blood eosinophil (%) | >2.5 | 66.1 | 68.1 |
FeNO, fractional exhaled nitric oxide; IgE, immunoglobulin E; AR, allergic rhinitis.
