Distribution of air pollution and weather variables with Spearman rank correlations
| Mean | SD | Range | Centile | |||||
|---|---|---|---|---|---|---|---|---|
| 10th | 25th | 50th | 75th | 90th | ||||
| NO2, nitric dioxide; SO2, sulphur dioxide; O3, ozone. | ||||||||
| NO2 μg/m3 | 30.3 | 12.1 | 7.0 to 90.7 | 16.6 | 22.0 | 28.4 | 37.3 | 45.6 |
| SO2 μg/m3 | 13.3 | 7.5 | 1.3 to 47.7 | 5.1 | 8.1 | 12.0 | 16.5 | 27.9 |
| O3 μg/m3 | 76.5 | 29.6 | 4.2 to 160.6 | 39.8 | 56.6 | 74.3 | 93.8 | 118.3 |
| Temperature (maximum) °C | 18.3 | 7.4 | −0.4 to 34.8 | 9.5 | 12.9 | 17.2 | 24.1 | 29.1 |
| Temperature (minimum) °C | 9.0 | 6.1 | −6.3 to 21.6 | 0.8 | 4.6 | 8.9 | 13.8 | 17.7 |
| Relative humidity (%) | 51.6 | 16.7 | 14 to 96 | 30 | 39 | 50 | 64 | 75 |
| SO2 | O3 | T° Max | T° Min | Humidity | Influenzae episodes | |||
| NO2 μg/m3 | 0.74 | −0.32 | −0.29 | −0.53 | 0.05 | 0.31 | ||
| SO2 μg/m3 | −0.28 | −0.18 | −0.36 | −0.03 | 0.26 | |||
| O3 μg/m3 | 0.71 | 0.54 | −0.72 | −0.37 | ||||
| Temperature maximum | 0.84 | −0.63 | −0.53 | |||||
| Temperature minimum | −0.27 | −0.55 | ||||||
| Relative humidity | 0.32 | |||||||