Table 2.
Descriptive statistics on environmental variables during the study period.
| Values | Total |
|---|---|
| Air pollutants, median (interquartile range) | |
| PM2.5, μg/m3 | 23 (18) |
| PM10, μg/m3 | 44 (33) |
| SO2, ppb | 4 (2) |
| CO, ppm | 0.5 (0.2) |
| O3, ppb | 17 (26) |
| NO2, ppb | 29 (24) |
| Meteorological data, mean (SD) | |
| Temperature, °C | 13.4 (18.2) |
| Atmospheric pressure, hPa | 1017.0 (13.3) |
| Humidity, % | 66 (37) |
Medians (IQR) or mean (standard deviation) are presented.
PM2.5 denotes fine particulate matter (<2.5 µm); PM10, fine particulate matter (<10 µm); SO2, Sulfur dioxide; CO, carbon monoxide; O3, ozone; NO2, Nitrogen dioxide.