Table 2.
Class | FEV1 | MEF50 | FENO | Asthma Control |
---|---|---|---|---|
Responders | Increase ≥ 10% predicted | Increase ≥ 15% predicted | Decrease < 20% for values > 35 (50) ppb or < 10 ppb for values < 35 (50) ppb | Improvement in asthma control |
Non-Responders | Change < 10% predicted | Change < 15% predicted | Decrease ≤ 20% FENO ≤ 20% for values over 35 (50) ppb or ± 10 ppb for values < 35 (50) ppb or increase >20% for values > 35 (50) ppb or > 10 ppb for values < 35 (50) ppb | No changes in partial asthma control or deterioration in asthma control |
FEV1—forced expiratory volume in one second, MEF50—maximal expiratory flow at 50% of the vital flow capacity, FENO—Fractional Exhaled nitric oxide.