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Table 1 Description of air pollutants, meteorological factors and emergency ambulance dispatches between 2014 to 2018 in Guangzhou

From: Relationship between different particle size fractions and all-cause and cause-specific emergency ambulance dispatches

  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