Baseline data for 165 patients randomised to the study
| Age (years) | 38 (range 18–64) | |
|---|---|---|
| Sex (M:F) | 73:92 | |
| Smoking | 145 non-smokers, 20 ex-smokers | |
| History of hay fever | 109 (66%) | |
| FEV1 (% predicted) | 79.8% (95% CI 77.2 to 82.5) | |
| PC20 methacholine (geometric mean) | 0.9 mg/ml (95% CI 0.69 to 1.07) | |
| Regular inhaled corticosteroids | None | 14 (8%) |
| 1–400 μg | 56 (34%) | |
| 401–1000 μg | 59 (36%) | |
| >1000 μg | 36 (22%) | |
FEV1 = forced expiratory volume in one second; PC20 = concentration of methacholine required to provoke a fall in FEV1 of 20%.