Total number and prevalence (%) of current, non-current and lifetime asthma, hospital admissions, and lost schooldays due to asthma or wheezing in 1978, 1991, and 1998 surveys
| 1978 (n=3003) | 1991 (n=2417) | 1998 (n=3076) | |
| Current asthma or wheezing | 45 (1.5%) | 112 (4.6%) | 184 (6.0%) |
| Non-current asthma or wheezing | – | 82 (3.4%) | 112 (3.6%) |
| Lifetime asthma or wheezing | – | 194 (8.0%) | 296 (9.6%) |
| Ever hospitalised for asthma or wheezing | – | 57 (2.4%) | 91 (3.0%) |
| Mean number of lost schooldays due to asthma or wheezing in the last 2 years: | |||
| Total sample | – | 0.31 | 0.34 |
| Current asthmatics | – | 6.75 | 5.70 |