Demographics and symptoms at start of treatment
| Number of subjects | 44 |
| Sex (m/f) | 24/20 |
| Median age (IQ range) (years) | 23 (18–28) |
| Characteristics of exacerbation, n (%) | |
| Increased cough | 43 (98) |
| Increased dyspnoea | 41 (93) |
| Change in sputum | 39 (89) |
| Malaise | 37 (84) |
| Fall in FEV1 >10%* | 24 (55) |
| Mean (SD) FEV1 at start of treatment, z score (% predicted) | −4.29 (1.03) |
| 52.1 (12.2) | |
*Represents a fall in forced expiratory volume in 1 s (FEV1) (litres) of over 10% compared with recent baseline (within 6 months).