Table 2.
Traffic exposure as a risk factor for wheeze, asthma, allergic rhinitis and allergic sensitization expressed as unadjusted odds ratio (OR 95%CI).
| Traffic exposure | Current wheeze | Ever wheeze | Physician-diagnosed asthma | Allergic rhinitis | Allergic sensitization | Allergic sensitization to any pollen | |
|---|---|---|---|---|---|---|---|
| Heavy traffica | ≥100 | 1.38 (0.97-1.95) | 1.22 (0.93-1.60) | 1.29 (0.80-2.08) | 1.25 (0.91-1.71) | 1.13 (0.87-1.47) | 0.98 (0.72-1.33) |
| ≥250 | 1.52 (1.04-2.23) | 1.18 (0.87-1.60) | 1.74 (1.06-2.87) | 1.23 (0.87-1.76) | 1.35 (1.00-1.81) | 1.23 (0.87-1.73) | |
| ≥500 | 1.84 (1.17-2.88) | 1.30 (0.89-1.90) | 1.70 (0.93-3.10) | 0.97 (0.60-1.55) | 1.12 (0.77-1.63) | 1.22 (0.79-1.88) | |
| Total trafficb | ≥4000 | 1.58 (1.09-2.29) | 1.21 (0.90-1.63) | 1.62 (0.99-2.66) | 1.36 (0.97-1.91) | 1.19 (0.90-1.59) | 1.10 (0.78-1.54) |
| ≥8000 | 1.51 (0.98-2.30) | 1.09 (0.76-1.55) | 1.48 (0.83-2.61) | 1.07 (0.71-1.62) | 1.09 (0.77-1.53) | 1.10 (0.74-1.64) | |
| Self-reportedc | 1.39 (0.98-1.99) | 1.52 (1.16-1.99) | 1.31 (0.81-2.11) | 1.52 (1.11-2.09) | 1.38 (1.06-1.80) | 1.25 (0.92-1.70) | |
a Number of heavy vehicles daily within 200 meters from the home (Heavy traffic)
b Total number of vehicles daily within 200 meters from the home (Total traffic)
c A large busy road or a very frequented bus stop within 200 meters of the home