Summary of environmental (pollutants and weather) variables
| Variables | Daily mean | SD | Minimum | Maximum | Percentiles | ||
| 25th | 50th | 75th | |||||
| CO (ppm) | 2.71 | 1.23 | 1.00 | 12.00 | 1.90 | 2.50 | 3.20 |
| O3 (μg/m3) | 95.75 | 44.24 | 14.50 | 282.00 | 63.85 | 88.65 | 119.70 |
| NO2 (μg/m3) | 120.34 | 49.86 | 30.90 | 390.80 | 81.75 | 113.80 | 150.20 |
| SO2 (μg/m3) | 14.00 | 6.15 | 2.10 | 42.90 | 9.60 | 13.20 | 17.40 |
| PM10 (μg/m3) | 48.71 | 21.87 | 9.60 | 169.00 | 32.30 | 43.90 | 60.60 |
| Minimum temperature (°C) | 15.50 | 3.37 | 3.70 | 21.80 | 13.10 | 15.80 | 18.20 |
| Mean relative humidity (%) | 79.17 | 8.43 | 45.50 | 96.60 | 74.50 | 80.00 | 85.00 |