Table 2.
Summary statistics of annual average concentrations of PM10, PM2.5, and NO2 predicted at home addresses of 14,614 children in the Seoul Atopy Friendly School Project Survey in Seoul, Korea, for 2010
| Exposure | Mean | SD | Min | Median | Max |
|---|---|---|---|---|---|
| Home only | |||||
| PM10 (μg/m3) | 49.67 | 3.2 | 39.07 | 49.4 | 66.3 |
| PM2.5 (μg/m3) | 25.3 | 3.0 | 18.42 | 25.03 | 50.89 |
| NO2 (ppm) | 35.99 | 5.8 | 22.52 | 34.71 | 75.24 |
| Home and school (2:1)a | |||||
| PM10 (μg/m3) | 49.36 | 2.3 | 42.29 | 49.17 | 61.1 |
| PM2.5 (μg/m3) | 25.13 | 2.2 | 19.38 | 24.94 | 41.69 |
| NO2 (ppm) | 35.6 | 4.1 | 26.93 | 34.91 | 63.76 |
a Weighted means of predicted air pollution concentrations at homes and schools using the ratio of 2:1