| Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | Area under ROC curve | |
| Sputum eosinophils | 0.565 | ||||
| ⩾0.1% | 88.2 | 19.3 | 12.1 | 92.9 | |
| >2.5% | 64.7 | 48.1 | 13.6 | 91.5 | |
| FeNO50 | 0.565 | ||||
| ⩾22 ppb | 68.4 | 39.1 | 10.4 | 92.3 | |
| >30 ppb | 57.9 | 46.7 | 10.1 | 91.5 | |
| Asthma control test | 0.726 | ||||
| <15 | 73.3 | 62.0 | 17.5 | 95.5 | |
| <20 | 100 | 36.5 | 14.7 | 100 | |
NPV, negative predictive value; PPV, positive predictive value; ROC, receiver operator characteristic.