| 1 | 2 | 3 | ||||||
| f | % | f | % | f | % | Value p | ||
| FEV1 | <80 | 2 | 15.4% | 3 | 16.7% | 6 | 20.0% | |
| >80 | 11 | 84.6% | 15 | 83.3% | 24 | 80.0% | 0.61 | |
| FVC | <80 | 2 | 15.4% | 5 | 27.8% | 5 | 16.7% | |
| >80 | 11 | 84.6% | 13 | 72.2% | 25 | 83.3% | 0.497 | |
| FEV1/FVC | <0.90 | 3 | 23.1% | 5 | 27.8% | 3 | 10.0% | |
| >0.90 | 10 | 76.9% | 13 | 72.2% | 27 | 90.0% | 0.566 | |
| FEF25-75 | <65 | 4 | 30.8% | 4 | 22.2% | 6 | 20.0% | |
| >65 | 9 | 69.2% | 14 | 77.8% | 24 | 80.0% | 0.967 | |