Asthma control and lung function at the three examinations
| Examination | |||
| 8 years n=618 | 16 years n=590 | 24 years n=596 | |
| Uncontrolled asthma (all), n (%) | 195 (32) | 188 (32) | 227 (38) |
| Uncontrolled asthma (participants with current asthma), n (%) | 174 (61) | 176 (46) | 217 (57) |
| Nightly symptoms (all), n (%) | 71 (11) | 60 (10) | 38 (6) |
| Daytime symptoms (all), n (%) | 26 (4) | 48 (8) | 83 (14) |
| Breathing difficulties affecting daily activities (all), n (%) | 129 (21) | 82 (14) | 145 (24) |
| Asthma exacerbation (all), n (%) | 84 (13) | 67 (11) | 64 (11) |
| Need for rescue treatment with SABA ≥2/week (all), n (%) | 35 (6) | 68 (11) | 60 (10) |
| Spirometry | n=425 | n=471 | n=431 |
| z-score FEV1 mean (sd) | 0.32 (0.90) | −0.26 (0.96) | −0.38 (0.89) |
| z-score FVC mean (sd) | 0.64 (0.90) | 0.12 (0.95) | −0.018 (0.88) |
| z-score FEV1/FVC mean (sd) | −0.53 (0.96) | −0.60 (1.02) | −0.57 (0.96) |
| FEV1 <80% predicted, n (%) | 6 (1) | 30 (6) | 33 (7) |
FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; SABA: short-acting bronchodilator.