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Table 2 Summary statistics of air pollutants and meteorological variables in Shanghai, China from January 1, 2008 to July 31, 2020

From: Effects of particulate matter on hospital admissions for respiratory diseases: an ecological study based on 12.5 years of time series data in Shanghai

Variables Mean ± SD Minimum P25 Median P75 Maximum
Air pollutants
 PM2.5, μg/m3 * 43.71 ± 31.18 5.00 22.00 36.00 56.00 255.00
 PM10, μg/m3 66.12 ± 44.07 6.00 37.28 54.00 82.00 599.29
 NO2, μg/m3 45.94 ± 20.31 5.00 31.00 43.00 57.00 141.65
 SO2, μg/m3 21.08 ± 17.39 3.00 9.00 15.00 26.83 146.78
 O3, μg/m3 * 98.59 ± 41.78 10.00 69.00 92.00 120.00 269.00
 CO, mg/m3 * 0.72 ± 0.26 0.30 0.52 0.68 0.80 2.28
Meteorological factors
 Temperature, °C 17.33 ± 8.86 −6.20 9.50 18.30 24.60 35.70
 Relative humidity, % 71.50 ± 12.77 23.00 63.00 72.00 81.00 100.00
  1. Note: * 2013.1.1–2020.7.31, P25 25th percentile, P75 75th percentile, SD standard deviation