- Prevalence of asthma symptoms by the International Study of Asthma and Allergies in Childhood (ISAAC) written questionnaire (N=2891).
| Asthma symptoms | Yes | No |
|---|---|---|
| n (%) | ||
| Wheeze (ever) | 260 (8.99) | 2631 (91.01) |
| Wheeze (12-month prevalence) | 122 (4.22) | 2769 (95.78) |
| Severe asthma (12-month prevalence) | 39 (1.35) | 2852 (98.65) |