Extrapolated PD values excluded | Extrapolated PD values included | ||||||
---|---|---|---|---|---|---|---|
No | Difference log2 (PD) | 95% repeatability | No | Difference log2 (PD) | 95% repeatability | ||
PD20 | 28 | 0.0 (–0.5 to 0.4) | ±1.7 | 31 | 0.0 (–0.4 to 0.4) | ±1.6 | |
PD15 | 29 | 0.4 (–0.2 to 0.9) | ±2.2 | 34 | 0.6 (0.0 to 1.2) | ±2.4 | |
PD10 | 32 | 0.3 (–0.3 to 0.9) | ±2.4 | 38 | 0.4 (–0.2 to 0.9) | ±2.5 |
PD20, PD15, PD10 = dose of AMP provoking a fall in forced expiratory volume in one second (FEV1) of 20%, 15%, and 10%, respectively.; AMP = adenosine-5′-monophosphate.