Table 2. Distribution summary of pollutants at the home address of participants and metrics of traffic proximity in CHASE study.
Results based on data averaged over 2005 and 2006.
| Pollutant | Mean | 5th percentile | 25th percentile | 50th percentile | 75th percentile | 95th percentile | IQR |
|---|---|---|---|---|---|---|---|
| NO2 (μg/m3) | 39.7 | 33.9 | 37.1 | 38.9 | 42.0 | 47.2 | 4.9 |
| NO (μg/m3) | 28.0 | 19.7 | 23.4 | 26.4 | 31.1 | 40.4 | 7.7 |
| NOx (μg/m3) | 67.7 | 53.5 | 60.5 | 65.5 | 73.1 | 87.7 | 12.6 |
| O3 (μg/m3) | 37.4 | 33.4 | 35.9 | 37.7 | 38.8 | 40.9 | 2.9 |
| Oxidants (μg/m3) | 77.1 | 74.8 | 75.9 | 76.6 | 77.9 | 80.6 | 2.0 |
| PM10 (μg/m3) | 24.8 | 23.3 | 24.1 | 24.6 | 25.3 | 26.8 | 1.2 |
| PM10 exhaust (μg/m3) | 0.8 | 0.5 | 0.7 | 0.8 | 0.9 | 1.3 | 0.2 |
| PM10 non exhaust (μg/m3) | 2.5 | 1.7 | 2.1 | 2.4 | 2.7 | 3.7 | 0.7 |
| PM2.5 (μg/m3) | 16.0 | 15.2 | 15.6 | 15.9 | 16.3 | 17.0 | 0.7 |
| PM2.5 exhaust (μg/m3) | 0.7 | 0.5 | 0.6 | 0.7 | 0.8 | 1.1 | 0.2 |
| PM2.5 non exhaust (μg/m3) | 0.7 | 0.5 | 0.6 | 0.7 | 0.8 | 1.0 | 0.2 |
| Pm coarse (μg/m3) | 8.8 | 8.1 | 8.5 | 8.7 | 9.0 | 9.7 | 0.5 |
| Distance of home from highly trafficked roads (meters) | 223.4 | 23.9 | 92.7 | 182.9 | 313.4 | 559.6 | 220.8 |
| Vehicle km driven per year within 100m from home | 91680 | 0 | 0 | 0 | 127148 | 369509 | 127148 |
| Distance of school from highly trafficked roads (meters) | 227.36 | 40.51 | 105.06 | 193.22 | 311.17 | 516.20 | 206.11 |
| Vehicle km driven per year within 100m from school | 66813 | 0 | 0 | 0 | 86823 | 273970 | 86823 |
IQR: inter quartile range