| *N | A | B | C | Value p | ||||||
| f | % | f | % | f | % | f | % | |||
| FEV1 | <80 | 0 | 0.0% | 1 | 14.3% | 3 | 17.6% | 7 | 22.6% | |
| >80 | 6 | 100.0% | 6 | 85.7% | 14 | 82.4% | 24 | 77.4% | 0.200 | |
| FVC | <80 | 0 | 0.0% | 1 | 14.3% | 3 | 17.6% | 8 | 25.8% | |
| >80 | 6 | 100.0% | 6 | 85.7% | 14 | 82.4% | 23 | 74.2% | 0.134 | |
| VEV1/ FVC | <0.90 | 2 | 33.3% | 2 | 28.6% | 3 | 17.6% | 4 | 12.9% | |
| >0.90 | 4 | 66.7% | 5 | 71.4% | 14 | 82.4% | 27 | 87.1% | 0.164 | |
| FEF25-75 | <65 | 1 | 16.7% | 2 | 28.6% | 4 | 23.5% | 7 | 22.6% | |
| >65 | 5 | 83.3% | 5 | 71.4% | 13 | 76.5% | 24 | 77.4% | 0.960 | |