Characteristics of participants with and without self-reported asthma at the three surveys, 1976–2004, among 20–35-yr-old Danes
| 1976–1978 | 1991–1994 | 2001–2004 | ||||
| Asthma | No asthma | Asthma | No asthma | Asthma | No asthma | |
| Age yrs | 26.8±4 | 28.3±4 | 29.7±4 | 29.8±4 | 28.3±5 | 27.6±4 |
| Current smokers | 53.3 (10) | 61.0 (779) | 45.0 (28) | 53.8 (654) | 22.6 (11) | 29.2 (194) |
| CMH | 26.7 (5) | 7.4 (95) | 23.1 (14) | 7.6 (92) | 15.1 (7) | 4.3 (29) |
| SOB | 9.6 (6) | 1.3 (16) | 7.7 (4) | 0.5 (23) | ||
| Exercise-induced SOB | 57.7 (35) | 20.0 (243) | 32.1 (16) | 13.1 (87) | ||
| SOB at night | 46.2 (28) | 2.5 (3) | 23.1 (11) | 2.2 (15) | ||
| Exercise-induced cough | 57.7 (35) | 12.7 (154) | 58.5 (29) | 13.0 (86) | ||
| Cough at night | 53.8 (33) | 12.9 (157) | ||||
| Wheeze | 88.5 (54) | 21.3 (259) | 67.9 (33) | 18.6 (123) | ||
| Exercise-induced wheeze | 31.0 (19) | 4.2 (51) | 69.2 (34) | 20.3 (135) | ||
| Asthma medication | 55.8 (34) | 0.4 (5) | 58.5 (29) | 0.5 (33) | ||
| Allergic rhinitis | 49.0 (30) | 17.6 (214) | ||||
| BMI kg·m−2 | 23.1±4.3 | 22.4±3.4 | 23.6±3.2 | 22.6±3.5 | 24.1±3.9 | 23.1±3.2 |
| BMI >25 kg·m−2 | 13.3 (3) | 21.0 (268) | 41.3 (25) | 31.0 (377) | 43.9 (22) | 37.7 (250) |
| FEV1 % pred | 95.2±15 | 96.5±14 | 86.2±15 | 97.1±13 | 83.1±13 | 97.0±10 |
| FEV1/FVC % | 81.2±11 | 83.6±9 | 78.2±10 | 86.9±7 | 75.9±10 | 84.1±7 |
Data are presented as mean±sd or % (n). CMH: chronic mucus hypersecretion; SOB: shortness of breath; BMI: body mass index; FEV1: forced expiratory volume in 1 s; % pred: % predicted; FVC: forced vital capacity.