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Table 1 Data of air pollutants, weather conditions, and deaths from PHD from 2013 to 2017

From: Associations between short-term exposure to gaseous pollutants and pulmonary heart disease-related mortality among elderly people in Chengdu, China

  Mean SD Min. 25% 50% 75% Max. IQR
SO2 (μg/m3) 21.6 10.5 6.0 14.0 20.0 27.0 71.0 13.0
NO2 (μg/m3) 41.5 13.2 13.0 32.0 39.0 49.0 89.0 17.0
CO (μg/m3) 1124.2 790.2 425.0 787.0 987.0 1285.0 16,608.0 498.0
O3-8h (μg/m3) 92.4 49.6 11.0 54.0 82.0 128.0 285.0 74.0
PM2.5 (μg/m3) 70.5 48.9 9.0 36.0 56.0 89.0 372.0 53.0
Temperature (°C) 17.0 7.2 −1.9 10.3 17.9 23.2 30.0 12.9
Humidity (%) 77.7 9.7 41.0 72.0 78.0 85.0 98.0 13.0
AP (hpa) 951.7 7.4 933.1 945.6 951.2 957.4 977.3 11.8
Deaths from PHD 30.1 16.7 4 19 25 37 109 18
Age groups (year)
 60–69 3.3 2.6 0 2 3 4 18 2
 70–79 8.8 5.5 0 5 7.5 11 44 6
 80–89 13.5 8.0 1 8 11 17 56 9
 90– 4.5 3.7 0 2 4 6 25 4
Gender
 Male 15.9 9.6 1 10 13 19 69 9
 Female 14.2 8.2 1 9 12 18 57 9
Marital status
 Married 15.0 8.8 1 9 13 18 63 9
 Alternative statusa 15.1 9.1 1 9 13 18 67 9
  1. aAlternative marital statuses include widowed, divorced, and never married
  2. Abbreviations: SO2 sulfur dioxide, NO2 nitrogen dioxide, CO carbon monoxide, O3-8h daily eight-hour mean concentration of O3, PM2.5 particulate matter less than 2.5 μm in aerodynamic diameter, AP atmospheric pressure, PHD pulmonary heart disease, SD standard deviation, IQR inter-quartile range