Sensitivity index of spirometry and oscillometry measurements
| Change (visit 3–visit 1) | Coefficient of variation (%) | Sensitivity index | |
|---|---|---|---|
| FEV, forced expiratory volume in 1 s; %FL, percentage flow limitation; IC, inspiratory capacity; Rrs, resistance of the respiratory system; VC, vital capacity; Xrs, reactance of the respiratory system. | |||
| This analysis uses percentage change rather than percentage predicted values for spirometry in order to be comparable with the coefficient of variation. | |||
| Spirometry (% change) | |||
| VC | 15.5 | 7.2 | 2.15 |
| FEV1 | 24.8 | 9.6 | 2.58 |
| IC | 16.7 | 8.8 | 1.90 |
| Oscillometry (% change) | |||
| Rrs | −0.95 | 12.2 | 0.08 |
| Xrs | 35.2 | 24.1 | 1.46 |
| Rrs,insp | −3.9 | 14.0 | 0.28 |
| Xrs,insp | 27.4 | 17.6 | 1.56 |
| Rrs,exp | 1.25 | 13.2 | 0.09 |
| Xrs,exp | 37.1 | 28.6 | 1.30 |
| %FL | −19.5 | 13.3 | 1.47 |