Prevalence of asthma and adjusted relative risks* according to heating types during child’s first year of life
| 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 during child’s first year of life; ¶smoking in other family members currently; **parental asthma; ††use of gas cookers currently; ‡‡sex. | |||
| §§Reference category. | |||
| AHR | 64 (17.3%) | 55 (25.5%) | 1.47† (1.06 to 2.03) |
| Recent wheeze | 94 (23.2%) | 73 (30.5%) | 1.44†§** (1.11 to 1.86) |
| Current asthma (recent wheeze + AHR) | 32 (8.7%) | 37 (17.4%) | 2.08†‡ (1.31 to 3.31) |
| Diagnosed asthma | 138 (34%) | 78 (32.2%) | 0.93†‡** (0.74 to 1.17) |
| Atopy | 144 (36.6%) | 91 (40.1%) | 1.12‡‡ (0.91 to 1.38) |