Table 2.
Lung function parameters of the COPD subjects
| Lung function parameters | Mean ± SEM |
|---|---|
| Plethysmography data | |
| FEV1 (L) | 1.12±0.04 |
| %FEV1 | 53.4±1.72 |
| FVC (L) | 2.29±0.05 |
| %FVC | 80.3±1.49 |
| FEV1/FVC ratio | 48.4±1.06 |
| IC (L) | 1.52±0.04 |
| %IC | 56.8±1.5 |
| RV (L) | 3.6±0.16 |
| %RV | 169.3±7.48 |
| TLC (L) | 6.02±0.16 |
| %TLC | 110±3.61 |
| Raw (kPa·L·S−1) | 7.82±0.64 |
| %Raw | 529.9±44.4 |
| Gaw (L·s·kPa−1) | 0.26±0.02 |
| %Gaw | 25.5±1.78 |
| RV/TLC | 0.57±0.01 |
| FOT data | |
| Reactance (X) | |
| Fres | 26.4±0.71 |
| X6 | −2.05±0.12 |
| X20 | −0.59±0.06 |
| XAvr | −1.10±0.08 |
| Resistance (R) | |
| FDep | −0.07±0.005 |
| R6 | 3.69±0.11 |
| R20 | 2.61±0.08 |
| RAvr | 2.98±0.08 |
Abbreviations: FDep, frequency dependence; FEV1, forced expiratory volume in 1 second; Fres, resonance frequency; FVC, forced vital capacity; Gaw, conductance; IC, inspiratory capacity; R6, resistance at 6 Hz; R20, resistance at 20 Hz; RAvr, average resistance; Raw, airway resistance; RV, residual volume; TLC, total lung capacity; X6, reactance at 6 Hz; X20, reactance at 20 Hz; XAvr, average reactance.