Table 1 Demographic characteristics of the subjects with wheezing
Variables | Total no. | Proportion of wheezing, % | ||
|---|---|---|---|---|
Ever wheezing | Current wheezing | Wheezing with exercise | ||
Sex | ||||
Female | 428529 | 7.0 | 4.1 | 6.5 |
Male | 415474 | 9.6 | 5.8 | 7.1 |
Age (years) | ||||
12 | 193263 | 8.8 | 5.4 | 7.4 |
13 | 287802 | 8.8 | 5.2 | 7.0 |
14 | 285288 | 8.0 | 4.5 | 6.5 |
15 | 77650 | 7.5 | 4.3 | 6.2 |
Parental education | ||||
Elementary or less | 185241 | 6.4 | 4.1 | 7.2 |
Junior high | 221062 | 9.0 | 4.4 | 7.1 |
Senior high | 289858 | 8.7 | 5.1 | 6.6 |
College or above | 147842 | 12.7 | 6.4 | 6.4 |
Household cigarettes (per day) | ||||
0 | 367810 | 8.8 | 4.9 | 6.2 |
1–20 | 424149 | 7.9 | 4.8 | 7.0 |
21–40 | 40090 | 9.3 | 5.9 | 9.0 |
≥41 | 11954 | 10.1 | 7.1 | 11.3 |
Birth weight (g) | ||||
<2500 | 25337 | 9.3 | 5.4 | 7.8 |
2500–3999 | 764963 | 8.4 | 4.9 | 6.8 |
≥4000 | 53703 | 8.0 | 4.7 | 7.0 |
Gestation age (weeks) | ||||
<37 | 17752 | 10.1 | 5.8 | 7.4 |
≥37 | 826251 | 8.4 | 4.9 | 6.8 |
Birth order | ||||
1 | 326622 | 9.7 | 5.6 | 6.8 |
2 | 270237 | 8.5 | 4.8 | 6.7 |
3 | 161474 | 7.1 | 4.3 | 6.9 |
≥4 | 85670 | 6.2 | 3.9 | 7.2 |
Ever physician-diagnosed asthma | ||||
Yes | 39528 | 77.0 | 47.3 | 37.7 |
No | 804415 | 5.1 | 2.8 | 5.3 |
Ever physician-diagnosed rhinitis | ||||
Yes | 185811 | 20.3 | 12.3 | 11.9 |
No | 658192 | 5.1 | 2.8 | 5.4 |
Ever physician-diagnosed asthma or rhinitis | ||||
Yes | 200800 | 23.9 | 14.4 | 13.5 |
No | 643203 | 3.6 | 2.0 | 4.7 |