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Table 2 Descriptive statistics for air pollution during different time windows attributed to pregnancy women (n = 1190)

From: Effects of ambient air pollution, fresh fruit and vegetable intakes as well as maternal psychosocial stress on the outcome of newborn otoacoustic emission hearing screening

Variables Mean ± SD Min P25 P50 P75 Max IQR
The first trimester
 PM10(μg/m3) 80.58 ± 10.86 49.78 72.76 81.94 88.43 106.91 15.67
 PM2.5(μg/m3) 49.15 ± 11.31 24.31 40.02 47.82 56.01 81.91 15.99
 CO(mg/m3) 1.05 ± 0.16 0.66 0.92 1.04 1.16 1.49 0.23
 NO2(μg/m3) 40.17 ± 8.40 9.53 33.79 41.22 46.34 59.83 12.55
 SO2(μg/m3) 14.56 ± 2.62 6.38 12.4 14.36 16.57 21.16 4.17
The second trimester
 PM10(μg/m3) 57.31 ± 13.72 36.37 47.58 52.3 63.11 104.3 15.53
 PM2.5(μg/m3) 33.34 ± 12.65 19.29 25.77 28.03 32.1 72.13 6.33
 CO(mg/m3) 0.94 ± 0.13 0.7 0.85 0.93 1.02 1.57 0.17
 NO2(μg/m3) 30.82 ± 6.84 15.68 26.4 29.95 33.61 57.07 7.21
 SO2(μg/m3) 13.59 ± 1.59 9.36 12.67 13.73 14.6 20.06 1.93
The third trimester
 PM10(μg/m3) 68.63 ± 15.37 40.4 55.33 68.18 80.06 116.65 24.73
 PM2.5(μg/m3) 48.23 ± 15.02 19.77 34.07 48.32 60.77 85.72 26.7
 CO(mg/m3) 1.00 ± 0.28 0.67 0.82 0.92 1.08 2.86 0.26
 NO2(μg/m3) 37.15 ± 8.32 17.85 30.98 37.69 42.81 60.62 11.83
 SO2(μg/m3) 13.51 ± 1.63 9.79 12.32 13.53 14.38 20.31 2.07