| Pre-BD | Post-BD | |
| R5 (KPa/l/s) | 0.37(0.16) | 0.31(0.11)** |
| R20 (KPa/l/s) | 0.31(0.12) | 0.27(0.09)** |
| R5-R20 (KPa/l/s) | 0.059(0.055) | 0.044(0.036)** |
| X5 (KPa/l/s) | −0.129(0.07) | −0.110(0.07) |
| X20 (KPa/l/s) | 0.094(0.05) | 0.114(0.05) |
| Resonant frequency (Hz) | 11.35(3.4) | 10.12(2.2)** |
| FEV1 (l) | 3.02(0.85) | 3.08(0.86)** |
Data presented as mean (SD). X, reactance; R, resistance.
**p<0.05; paired t test pre versus post-bronchodilator (BD).