Table 3 Sociodemographic characteristics of the study sample
% (N) | Cases (N = 188) | Controls (N = 294) |
|---|---|---|
Mean age in years (SD) | 10.6 (2.6) | 10.7 (2.7) |
Boys | 99 (52.7) | 157 (53.4) |
Residence in urban area of Valdivia | 150 (80.7) | 252 (85.7) |
Atopic sensitizationa*** | 147 (78.2) | 138 (46.9) |
At least one parent with atopic disease*** | 65 (34.6) | 56 (19.1) |
At least one parent with university attendance | 38 (20.3) | 59 (20.1) |
Total IgE > 100 IU/ml*** | 104 (64.2)c | 108 (44.1)d |
Parasitic infectione | 26 (18.8)f | 28 (20.4)g |
12 months prevalence of: | ||
- wheeze*** | 126 (67.7) | 48 (16.4) |
- rhinitis*** | 154 (81.9) | 150 (51.0) |
- atopic dermatitis symptoms | 45 (24.3) | 56 (19.2) |