Distribution of demographic factors, environmental exposures, and asthma symptoms by household income
| <$20 000 (n=351) | $20 000– 60 000 (n=1517) | >$60 000 (n=771) | ||||
|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | |
| *p<0.05, **p<0.01. | ||||||
| Age (years) | ||||||
| 5–12 | 222 | 67.3 | 944 | 59.8 | 452 | 56.9** |
| 13–19 | 129 | 32.7 | 572 | 40.2 | 319 | 43.1 |
| Sex | ||||||
| Male | 160 | 45.3 | 815 | 53.5 | 414 | 53.2 |
| Female | 191 | 54.7 | 702 | 46.5 | 357 | 46.8 |
| Highest parental education | ||||||
| Secondary school not completed | 140 | 38.8 | 139 | 8.3 | 8 | 0.6 |
| Secondary school completed | 190 | 55.5 | 1065 | 69.6 | 302 | 37.5 |
| University degree | 21 | 5.7 | 312 | 22.1 | 461 | 61.9** |
| Unknown | 0 | 1 | 0.1 | 0 | ||
| Parental marital status | ||||||
| Married | 116 | 33.0 | 1278 | 83.8 | 744 | 96.9** |
| Separated/divorced/widowed | 166 | 46.8 | 198 | 13.5 | 21 | 2.6 |
| Single (never married) | 68 | 20.0 | 40 | 2.6 | 6 | 0.5 |
| Unknown | 1 | 0.2 | 1 | 0.1 | 0 | |
| Cats | ||||||
| Yes | 120 | 33.5 | 468 | 27.9 | 210 | 22.2* |
| No | 231 | 66.5 | 1049 | 72.1 | 560 | 77.4 |
| Unknown | 0 | 0 | 1 | 0.3 | ||
| Dogs | ||||||
| Yes | 83 | 22.3 | 557 | 35.1 | 313 | 37.33** |
| No | 268 | 77.7 | 959 | 64.9 | 458 | 62.67 |
| Unknown | 0 | 1 | 0.03 | 0 | ||
| Regularly exposed to second hand smoke at home | ||||||
| Yes | 194 | 56.8 | 574 | 38.4 | 151 | 19.7** |
| No | 157 | 43.3 | 936 | 60.9 | 614 | 79.4 |
| Unknown | 0 | 7 | 0.7 | 6 | 0.9 | |
| Asthma symptoms experienced continually (daily or almost daily) | ||||||
| Yes | 66 | 19.1 | 134 | 9.3 | 81 | 11.1* |
| No | 238 | 65.6 | 1109 | 72.7 | 543 | 69.9 |
| Unknown | 47 | 15.3 | 274 | 18.0 | 147 | 19.0 |
| Sleep disturbed due to asthma more than twice monthly | ||||||
| Yes | 55 | 16.2 | 182 | 13.3 | 95 | 13.4 |
| No | 287 | 80.3 | 128 | 79.9 | 642 | 77.8 |
| Unknown | 9 | 3.5 | 54 | 6.8 | 34 | 8.7 |