AUC | Cutoff value | Sensibility (%) | Specificity (%) | PPV (%) | NPV (%) | Youden index | P-value | |
---|---|---|---|---|---|---|---|---|
FeNO (ppb) | 0.613 (95% CI 0.55–0.68) | 28.5 | 61.9 | 63.2 | 70.9 | 53.4 | 0.251 | 0.001 |
ΔFEV1 (mL) | 0.765 (95% CI 0.71–0.82) | 315 | 59.7 | 86.4 | 85.0 | 59.3 | 0.461 | < 0.001 |
FeNO + ΔFEV1 | 0.774 (95% CI 0.72–0.83) | – | 61.3 | 86.4 | 93.4 | 52.2 | 0.477 | < 0.001 |