Table 1. Characteristics of study population.
| Characteristics | Age group | |
|---|---|---|
| 6–7 yr (n = 3,753) | 12–13 yr (n = 3,930) | |
| Gender | ||
| Male | 1,892 (50.4) | 1,947 (49.5) |
| Female | 1,861 (49.6) | 1,983 (50.5) |
| No. of allergens showing positive | ||
| SPT results | ||
| 0 | 2,214 (59.0) | 1,768 (45.0) |
| 1 | 315 (8.4) | 383 (9.7) |
| 2 | 729 (19.4) | 797 (20.3) |
| ≥ 3 | 495 (13.2) | 982 (25.0) |
| Diagnosis, ever | ||
| Asthma | 384 (10.2) | 286 (7.3) |
| AR | 1,391 (37.1) | 1,162 (29.6) |
| AD | 1,339 (35.7) | |
| Symptom, within the last 12 months | ||
| Asthma | 368 (9.8) | 322 (8.2) |
| AR | 1,622 (43.2) | 1,649 (42.0) |
| AD | 762 (20.3) | 501 (12.7) |
| Treatment, within the last 12 months | ||
| Asthma | 144 (3.8) | 62 (1.6) |
| AR | 1,077 (28.7) | 788 (20.1) |
| AD | 573 (15.3) | 342 (8.7) |
| Paternal history of allergic diseases | 1,079 (28.8) | 692 (17.6) |
| Maternal history of allergic diseases | 1,230 (32.8) | 856 (21.8) |
Values are presented as number of children (%).
SPT = skin prick test, AR = allergic rhinitis, AD = atopic dermatitis.