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Table 4 Summary statistics for each pollutant during different gestation in Liuzhou, China

From: The association between ambient air pollution and birth defects in five major ethnic groups in Liuzhou, China

  Mean ± SD Minimum Maximum 25th PCTL 50th PCTL 75th PCTL
Before pregnancy
 1st month
  PM2.5 (μg/m3) 41.95 ± 16.03 15.35 89.78 29.45 40.31 53.35
  PM10 (μg/m3) 64.97 ± 31.93 26.49 218.56 44.36 58.36 77.33
  O3 (μg/m3) 80.91 ± 16.30 17.78 108.78 74.28 83.28 91.22
  SO2 (μg/m3) 20.74 ± 19.17 4.92 218.87 14.13 19.39 23.35
  NO2 (μg/m3) 27.01 ± 14.23 10.56 102.32 19.38 22.16 32.35
  CO (mg/m3) 1.06 ± 0.25 0.63 1.92 0.91 1.14 1.21
 2nd month
  PM2.5 41.45 ± 15.72 14.98 131.32 28.48 39.75 50.02
  PM10 61.66 ± 23.30 25.78 217.46 43.46 57.93 77.11
  O3 83.77 ± 11.69 16.54 109.21 77.25 86.37 92.22
  SO2 18.72 ± 11.19 3.45 217.89 14.13 19.32 22.32
  NO2 25.27 ± 9.86 9.43 101.73 19.28 22.27 30.03
  CO 1.02 ± 0.20 0.58 1.87 0.96 1.11 1.21
 3rd month
  PM2.5 43.18 ± 19.46 4.67 118.45 27.65 40.18 57.34
  PM10~ 61.50 ± 21.40 31.32 218.46 42.87 58.42 77.36
  O3 82.03 ± 14.00 17.46 108.32 75.43 83.43 92.03
  SO2 18.78 ± 8.44 4.32 218.68 13.94 18.27 22.35
  NO2 24.71 ± 8.00 10.46 102.98 18.75 22.17 30.43
  CO 1.03 ± 0.21 0.67 1.96 0.89 1.02 1.23
Pregnancy
 1st month
  PM2.5 41.78 ± 16.93 15.67 88.67 29 39.36 53.37
  PM10 65.90 ± 37.05 25.67 217.95 43 50.43 56.45
  O3 76.30 ± 21.03 17.79 107.74 68 81.37 91.76
  SO2 22.23 ± 23.34 4.46 217.58 15 19.03 24.36
  NO2 27.97 ± 16.69 9.08 101.67 18 22.17 32.42
  CO 1.11 ± 0.28 0.64 1.87 0.9 1.10 1.31
 2nd month
  PM2.5 39.78 ± 17.25 15.56 89.63 27 35.44 52.38
  PM10 63.18 ± 38.45 25.66 217.63 42 49.38 72.17
  O3 72.06 ± 22.83 17.12 108.58 51 78.47 90.04
  SO2 23.20 ± 23.48 4.12 218.57 15 20.11 25.17
  NO2 27.98 ± 17.30 9.09 102.37 18 22.03 32.47
  CO 1.14 ± 0.30 0.68 1.92 0.9 1.12 1.33
 3rd month
  PM2.5 38.25 ± 16.94 6.06 89.89 27 35.48 46.34
  PM10 62.88 ± 38.27 25.45 218.47 42 50.43 72.46
  O3 68.30 ± 23.65 17.59 107.74 46 74.47 89.52
  SO2 24.86 ± 23.00 4.67 217.83 16 21.22 28.49
  NO2 27.67 ± 17.37 7.09 101.87 18 22.36 33.27
  CO 1.18 ± 0.29 0.69 1.96 1.0 1.22 1.37
  1. Abbreviations: SD standard deviation, 1st month The first month exposure, 2nd month The second month exposure, 3rd month The third month exposure, PCTL percentile