Table 2.
Summary statistics of median road traffic noise levels (dB) and air pollution concentrations (µg/m3) across small areas in London (2003–10)
| Exposure | Mean | SD | 10th % | 33th % | Median | 66th % | 90th % |
|---|---|---|---|---|---|---|---|
| COA (n = 27 686) | |||||||
| LAeq,16 h | 57.7 | 4.19 | 54.9 | 55.2 | 55.6 | 56.9 | 64.6 |
| Lnight | 52.4 | 4.45 | 49.3 | 49.7 | 50.2 | 51.7 | 59.7 |
| PM2.5 | 15.1 | 0.85 | 14.1 | 14.6 | 15.0 | 15.4 | 16.2 |
| NOx | 65.7 | 15.8 | 46.6 | 57.3 | 63.8 | 70.7 | 86.5 |
| LSOA (n = 5358) | |||||||
| LAeq,16 h | 56.6 | 2.54 | 54.9 | 55.2 | 55.6 | 56.2 | 59.6 |
| Lnight | 51.2 | 2.76 | 49.3 | 49.7 | 50.1 | 50.8 | 54.7 |
| PM2.5 | 15.0 | 0.80 | 14.1 | 14.6 | 15.0 | 15.3 | 16.1 |
| NOx | 64.4 | 14.5 | 46.2 | 56.8 | 63.1 | 69.1 | 83.7 |
COA, census output area; LSOA, lower layer super output area.