Mean (SD) age (years) | 39 (14) | 43 (13) | 45 (12) | 0.075* |
Sex (M:F) | 10:20 | 14:39 | 17:33 | 0.668‡ |
Smoking (non:current) | 27:3 | 48:5 | 38:12 | 0.097§ |
Atopy % (n)†† | 25% (8) | 42% (22) | 54% (27)¶ | 0.034‡ |
Median (IQR) inhaled corticosteroids (μg/day) | | 500 (400–800) | 900 (475–1600) | 0.006** |
Median (IQR) duration of asthma (years), range | | 1 (0.5–1.5)0.1–39 | 3 (0.5–9)0.1–31 | 0.010** |
Mean (SD) FEV1 | 3.56 (0.78) | 3.41 (0.82) | 2.7 (0.61)† | <0.001* |
Mean (SD) FEV1 (% predicted) | 97.6 (11) | 101 (11) | 80.5 (13)† | <0.001* |
Mean (SD) FVC | 4.33 (0.98) | 4.2 (1.03) | 3.57 (0.82)† | 0.001* |
Mean (SD) FVC (% predicted) | 99.0 (11) | 103 (12) | 87.1 (12)† | <0.001* |
Mean (SD) FEV1/FVC% | 82.6 (5.9) | 81.6 (5.1) | 76.4 (8.1)† | <0.001* |
Mean (SD) FEV1/FVC (% predicted) | 98.1 (7.2) | 97.9 (7.4) | 92 (8.9)† | <0.001* |