Age at first symptoms (years) | 40.2 | 40.4 | 40.2 | 40.3 | 39.6 | 40 |
Baseline FEV1 (% predicted) | 89.4 | 88.4 | 88.7 | 87.5 | 89.9 | 86.3 |
Atopic (%) | 45 | 45.5 | 39 | 37.3 | 39.2 | 30.6 |
Current/ex/never smokers (%) | 24/28/48 | 20.5/30.7/48.9 | 21.6/28.8/49.5 | 22.9/30.1/47 | 18/31.1/50.8 | 21.4/33.3/45.2 |
On inhaled steroids at time of removal from exposure | 82.7 | 80 | 77.2 | 80.2 | 81 | 86.4 |
Increased bronchial hyperresponsiveness at diagnosis (%) | 63.6 | 62.8 | 61.5 | 65.2 | 51.1 | 67.6 |
Median latent interval between first exposure and symptoms (months) | 64 | 72 | 64 | 72 | 72 | 66 |
Duration of symptomatic exposure (months) | 45 | 57 | 42 | 41 | 57 | 55 |