Table 1 Description of air pollutants, meteorological factors and emergency ambulance dispatches between 2014 to 2018 in Guangzhou
| Â | No. of missing days | Daily mean (SD) | Quantiles | ||||
|---|---|---|---|---|---|---|---|
Min | P25 | P50 | P75 | Max | |||
Pollutants, μg/m3 | |||||||
 PM2.5 | 17 | 36.0 (19.0) | 4.6 | 22.0 | 31.7 | 46.8 | 148.3 |
 PM2.5–10 | 17 | 20.5 (9.2) | 1.3 | 14.5 | 18.7 | 25.0 | 62.2 |
 PM10 | 17 | 56.5 (26.1) | 10.0 | 37.5 | 50.4 | 71.1 | 208.3 |
 NO2 | 17 | 44.1 (17.4) | 11.7 | 31.7 | 40.4 | 52.1 | 155.0 |
 O3 | 17 | 45.2 (24.9) | 3.5 | 26.7 | 40.6 | 59.6 | 139.2 |
 SO2 | 17 | 15.9 (13.3) | 2.8 | 9.2 | 12.1 | 16.4 | 85.4 |
Meteorological factors | |||||||
 Temperature (°C) | 0 | 22.2 (6.1) | 3.4 | 17.5 | 23.8 | 27.4 | 32.8 |
 Relative Humidity (%) | 0 | 79.6 (10.2) | 31.0 | 74.0 | 81.0 | 87.0 | 100.0 |
Emergency ambulance dispatches, n | |||||||
 All-cause | 0 | 391 (38.9) | 267 | 364 | 388 | 413 | 553 |
 Cardiovascular diseases | 0 | 38 (8.0) | 19 | 32 | 37 | 43 | 68 |
 Respiratory diseases | 0 | 26 (7.3) | 9 | 21 | 25 | 30 | 53 |