Table 3 Indices of exposure to air pollution and incidence of asthmatic episodes a during follow-up in 329 children with recurrent wheezing or asthma b
From: Impact of air pollution on respiratory diseases in children with recurrent wheezing or asthma
| Â | Asthma episode(s) (n = 159) | No asthma episodes (n = 170) | OR (95% CI)c | ||
|---|---|---|---|---|---|
| Â | N | % | N | % | Â |
Proximity to car-traffic | Â | Â | Â | Â | Â |
No | 66 | 41.5 | 93 | 54.7 | 1 (reference) |
Yes | 93 | 58.5 | 77 | 45.3 | 1.79 (1.13-2.84) |
Proximity to factories | Â | Â | Â | Â | Â |
No | 144 | 90.6 | 150 | 88.2 | 1 (reference) |
Yes | 15 | 9.4 | 20 | 11.8 | 0.83 (0.40-1.74) |
Residence in a green area | Â | Â | Â | Â | Â |
No | 73 | 45.9 | 53 | 31.2 | 1 (reference) |
Yes | 86 | 54.1 | 117 | 68.8 | 0.50 (0.31-0.80) |