| FVC | FEV1 | FEV1/FVC | FEF25-75 |
N (1st / 2nd test) | 300 / 274 | 318 / 288 | 300 / 274 | 300 / 274 |
First test Z-score; mean (SD) | 0,74 (0.98) | 0,66 (1.01) | -0,18 (0.88) | -0,11 (1.01) |
Second test Z-score; mean (SD) | 0,51 (0.94) | 0,41 (0.99) | -0,21 (0.89) | -0,27 (0.99) |