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Table 2 Distributions of daily air pollution, meteorological factors, and outpatient visits for arrhythmia

From: Associations between air pollution and outpatient visits for arrhythmia in Hangzhou, China

Variables Mean + SD Min 25th 50th 75th Max
PM2.5 (ug/m3) 52.9 + 29.2 7.6 31.2 46.6 67.7 205.5
PM10 (ug/m3) 77.6 + 41.8 5.8 46.6 70.5 101.0 271.0
SO2 (ug/m3) 15.5 + 7.7 4.1 9.7 13.5 19.1 46.7
NO2 (ug/m3) 43.9 + 16.5 9.3 31.5 41.8 54.4 109.7
CO (mg/m3) 0.85 + 0.25 0.39 0.67 0.80 0.97 2.05
O3 (ug/m3) 55.1 + 27.1 5.3 34.2 51.8 73.5 149.3
Temperature (°C) 17.8 + 8.4 −5.0 10.5 19.1 24.4 34.4
Humidity (%) 74.4 + 13.9 27.0 65.0 76.0 85.0 98.0
Air pressure (hPa) 1011.4 + 8.9 989.3 1003.7 1011.1 1018.7 1036.6
Wind Speed (m/s) 3.9 + 3.8 0.0 0.5 3.2 7.4 12.7
Outpatient visits 14.8 + 7.9 0.0 9.0 14.0 20.0 59.0