| 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 |