Numbers (%) of children with at least one hospital admission for asthma by distance of residence from main road
| Cases of asthma | Non-respiratory controls | |
| Living within 150 m of main road | 522 (37.8%) | 2240 (39.3%) |
| Living >150 m from main road | 858 (62.2%) | 3463 (60.7%) |
Odds ratios2-151 (95% confidence intervals): unadjusted = 0.94 (0.83 to 1.06), p = 0.32; adjusted2-152 = 0.93 (0.82 to 1.06), p = 0.27.
↵2-151 Odds of hospital admission with asthma in children living within 150 m of main road compared with odds for those living further away.
↵2-152 Adjusted for age, sex, hospital, and deprivation.