| FEV1 | 2.3 ± 0.1 | 2.0 ± 0.2 | 1.8 ± 0.2 | F (2, 89) = 1.83, p = 0.17 |
| FEV1% | 85.3 ± 2.7 | 79.1 ± 5.8 | 66.5 ± 6.7 | F (2, 89) = 3.14, p = 0.048 |
| FVC | 3.2 ± 0.1 | 3.0 ± 0.2 | 3.1 ± 0.3 | F (2, 89) = 0.45, p = 0.64 |
| FVC% | 100.9 ± 2.6 | 94.9 ± 5.8 | 99.4 ± 5.8 | F (2, 89) = 0.55, p = 0.58 |
| FEV1/FVC ratio | 71.8 ± 1.3 | 68.7 ± 3.1 | 59.2 ± 4.8 | F (2, 89) = 5.00, p = 0.009 |
| Number of hospital admissions with asthma
in the preceeding year | 1.0 ± 0.1 | 1.2 ± 0.4 | 1.2 ± 0.4 | χ² = 13.1, df = 12, p = 0.36 |
| AQLQ score | 3.8 ± 0.2 | 3.4 ± 0.3 | 3.8 ± 0.5 | χ² = 79.3, df = 98, p = 0.92 |
| ACT score | 13.6 ± 0.7 | 12.5 ± 1.0 | 11.1 ± 1.9 | χ² = 38.2, df = 40, p = 0.55 |
| BTS step in Asthma
Management | 3.8 ± 0.1 | 3.6 ± 0.2 | 3.4 ± 0.3 | χ² = 10.3, df = 8, p = 0.25 |