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Table 1 Summary statistics for daily temperature, relative humidity, air pollutants and cerebrovascular deaths in five Chinese cities during 2004 to 2008

From: The effects of ambient temperature on cerebrovascular mortality: an epidemiologic study in four climatic zones in China

City Variable Min 25% Median 75% Max Mean SD
Beijing Temperature (°C) −10.1 3.5 14.8 23.6 32.1 13.6 10.9
Relative humidity (%) 8 34 52 68 97 52 20
PM10 (μg/m3) 10.0 78.3 128.0 184.0 600.0 144.6 91.3
NO2 (μg/m3) 14.0 47.1 60.9 76.8 214.4 64.2 25.7
Deaths 0 1 2 2 8 2 1
Tianjin Temperature (°C) −10.5 3.0 14.5 23.4 31.3 13.3 11.1
Relative humidity (%) 13 46 60 73 97 59 18
PM10 (μg/m3) 11.4 72.0 92.0 123.2 755.7 104.2 55.4
NO2 (μg/m3) 9.0 30.6 41.2 53.3 146.6 43.8 19.1
Deaths 0 1 2 4 10 3 2
Shanghai Temperature (°C) −3.2 10.0 18.7 25.2 33.8 17.6 9.0
Relative humidity (%) 31.0 63.0 71.0 79.0 95.0 70.4 11.8
PM10 (μg/m3) 12.0 52.0 76.0 114.0 600.0 89.2 53.6
NO2 (μg/m3) 12.8 43.2 54.4 72.0 171.2 58.4 22.8
Deaths 0 1 1 2 8 2 1
Wuhan Temperature (°C) −2.7 10.3 19.6 26.1 34.2 18.2 9.4
Relative humidity (%) 21 61 70 78 97 70 13
PM10 (μg/m3) 0.0 80.0 114.0 150.0 350.0 120.3 55.0
NO2 (μg/m3) 0.0 36.8 48.0 64.0 153.6 51.6 21.5
Deaths 0 2 3 4 12 3 2
Guangzhou Temperature (°C) 5.4 18.5 24.4 27.9 34.2 22.9 6.2
Relative humidity (%) 20 63 72 80 95 70 13
PM10 (μg/m3) 8.0 48.0 73.0 105.1 329.1 81.6 44.4
NO2 (μg/m3) 17.1 42.4 58.3 82.5 232.0 66.3 30.4
Deaths 0 1 2 3 10 2 2
  1. SD: standard deviation.