Prevalence of asthma and relative risks* according to current heating types
| Asthma outcome | No fume emitting heaters | Fume emitting heaters | |
|---|---|---|---|
| N (%)*** | N (%) | Relative risk (95% CI) | |
| AHR = airway hyperresponsiveness. | |||
| *Relative risks derived from log-linear regression. | |||
| Relative risk adjusted for †atopy; ‡maternal smoking current; §smoking in other family members in child’s first year of life; ¶smoking in other family members currently; **parental asthma; ††use of gas cookers currently; ‡‡sex; §§use of fume emitting heaters in child’s first year of life. | |||
| ***Reference category. | |||
| AHR | 81 (19.4%) | 43 (21.1%) | 0.88†§§ (0.61 to 1.27) |
| Recent wheeze | 111 (24.3%) | 69 (30.4%) | 1.03†§**§§ (0.77 to 1.38) |
| Current asthma (recent wheeze + AHR) | 46 (11.2%) | 26 (12.9%) | 0.94†‡§§ (0.58 to 1.54) |
| Diagnosed asthma | 155 (33.7%) | 75 (32.9%) | 0.91†‡** (0.72 to 1.14) |
| Atopy | 163 (36.7%) | 76 (35.2%) | 0.97‡‡ (0.78 to 1.21) |