Age (%) | | | | |
<40 years | 38.2 | 39.1 | 37.2 | 0.38 |
40–50 years | 42.2 | 41.6 | 42.8 | |
>50 years | 19.6 | 19.3 | 20.0 | |
Age when finished education (%) | | | | |
⩽16 years | 17.0 | 16.0 | 18.1 | 0.11 |
17–21 years | 36.1 | 37.0 | 35.2 | |
>21 years | 46.9 | 47.0 | 46.7 | |
BMI (%) | | | | |
<25 kg/m2 | 52.1 | 43.4 | 61.2 | <0.001 |
25–30 kg/m2 | 35.8 | 44.8 | 26.5 | |
>30 kg/m2 | 12.1 | 11.8 | 12.3 | |
Smoking (%) | | | | |
Never smokers | 43.6 | 39.6 | 47.7 | <0.001 |
Past smokers | 24.8 | 26.7 | 22.8 | |
Moderate smokers | 20.3 | 19.5 | 21.2 | |
Heavy smokers | 11.3 | 14.2 | 8.3 | |
Atopy (%) | 28.5 | 32.6 | 24.2 | <0.001 |
Asthma-like symptoms (%) | 24.1 | 25.2 | 23.0 | 0.07 |
Wheeze | 20.5 | 22.2 | 18.8 | 0.003 |
SOB at rest | 5.2 | 4.0 | 6.3 | <0.001 |
Woken by SOB | 5.2 | 4.9 | 5.6 | 0.31 |
Current asthma (%) | 4.9 | 4.4 | 5.4 | 0.11 |
Family history of asthma (%) | 11.0 | 9.7 | 12.4 | 0.002 |
FEV1 (l)*† | 3.60 (0.65) | 4.14 (0.40) | 3.03 (0.30) | <0.001 |
FEV1 (% pred)* | 107 (14) | 106 (13) | 108 (14) | <0.001 |
FVC (% pred)* | 111 (14) | 108 (13) | 115 (14) | <0.001 |
BHR (%) | 13.0 | 9.4 | 16.6 | <0.001 |
Usual frequency of exercise (%) | | | | |
⩽1 time/week | 60.0 | 58.9 | 61.0 | 0.15 |
2–3 times/week | 26.5 | 27.7 | 25.3 | |
⩾4 times/week | 13.5 | 13.4 | 13.7 | |
Usual duration of exercise (%) | | | | |
<1 h/week | 41.5 | 38.2 | 44.9 | <0.001 |
1–3 h/week | 42.4 | 42.8 | 42.0 | |
⩾4 h/week | 16.1 | 19.0 | 13.1 | |