Self reported prevalence (%) of asthma, rhinitis, and eczema and their related symptoms (written questionnaire)
| Symptom | OR (95%CI) | p Value | Boys (n = 1455) | Girls (n = 1545) | Boy:girl ratio | All (n = 3000) |
|---|---|---|---|---|---|---|
| Asthma | ||||||
| Ever wheezed | 1.73 (1.42 to 2.11) | < 0.001 | 35.0 | 24.0 | 1.5 | 29.6 |
| Wheeze in the past year | 1.18 (0.89 to 1.57) | 21.5 | 15.4 | 1.4 | 18.0 | |
| Wheezing with exercise past year | 1.50 (1.16-1.96) | < 0.01 | 16.4 | 11.1 | 1.5 | 13 |
| Persistent cough past year | 1.12 (0.91 to 1.36) | 28.6 | 26.0 | 1.5 | 27.7 | |
| Ever had asthma | 1.83 (1.89 to 2.32) | < 0.001 | 27.7 | 18.3 | 1.5 | 22.7 |
| Rhinitis | ||||||
| Ever had rhinitis | 1.41 (1.14 to 1.74) | < 0.01 | 25.0 | 20.4 | 1.2 | 23.1 |
| Rhinitis in the past year | 1.32 (0.99 to 1.79) | < 0.05 | 22.6 | 18.8 | 1.2 | 20.5 |
| Associated itchy eye in the past year | 1.56 (1.05 to 2.34) | < 0.05 | 11.6 | 8.1 | 1.4 | 10.0 |
| Ever had hay fever | 1.58 (1.18 to 2.13) | < 0.01 | 12.0 | 7.9 | 1.5 | 10.1 |
| Eczema | ||||||
| Chronic rash ever | 0.89 (0.67 to 1.16) | 17.8 | 18.7 | 18.1 | ||
| Chronic rash in the past year | 0.72 (0.49 to 1.02) | 14.7 | 16.9 | 15.7 | ||
| Chronic rash with typical distribution | 13.2 | 14.7 | 13.8 | |||
| Ever had eczema | 1.05 (0.84 to 1.31) | 27.8 | 27.0 | 27.8 | ||
| Age at which itchy rash first occurred | ||||||
| < 2 years | 7.7 | 8.3 | 8.0 | |||
| 2–4 years | 3.6 | 4.7 | 4.2 | |||
| ⩾ 5 years | 5.0 | 4.8 | 4.9 | |||
CI, confidence interval; OR, odds ratio.