Patient demographics
| Healthy subjects | Non-severe asthma patients | Severe asthma patients | |
| Subjects | 5 | 5 | 5 |
| Age years | 36.4±12.72 | 42.1±16.06 | 40.9±11 |
| Males:females | 3:2 | 2:3 | 0:5 |
| Duration of asthma years | N/A | 21.2±15.32 | 25.56±13.24 |
| Inhaled corticosteroid dose μg BDP equivalent | 0 | 480±582.71 | 1688.89±176.38 |
| Atopy | 0 | 3 | 5 |
| Receiving oral corticosteroids | 0 | 0 | 5 |
| FEV1 L | 4.02±0.48 | 2.7±0.82 | 2.7±0.77 |
| FEV1 % predicted | 104.23±7.28 | 84.48±18.34 | 81.42±14.82 |
| FEV1/FVC % | 78.89±5.98 | 73.98±9.67 | 69.62±9.31 |
| PC20 mg·mL−1 | >16 | 0.75±9.31 | Not performed |
Data are presented as n or mean±sd. BDP: beclomethasone diproprionate; FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; PC20: provocative concentration causing a 20% fall in FEV1.