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Table 2 Description of pollutants’ concentration (μg/m3) throughout pregnancy

From: Maternal exposure to ambient fine particulate matter and fetal growth in Shanghai, China

Pollutants

Mean

Percentiles

Range

25

50

75

PM2.5

48.0

44.5

48.6

51.2

34.3~67.9

PM10

60.5

55.8

62.6

64.4

36.7~80.6

NO2

42.3

36.8

44.2

50.1

8.7~55.9

O3

67.5

63.1

66.8

73.3

0.7~87.1

SO2

16.5

14.2

17.4

18. 6

1.1~22.2

RHa

17.9

15.4

18.7

20.2

9.0~23.8

Tb

70.1

69.7

70.2

70.7

65.4~73.5

Ie (PM2.5) c

51.2

46.6

50.5

55.0

29.1~82.1

  1. aRelative humidity;
  2. bTemperature;
  3. cIndividual exposure, it was the average PM2.5 values of every gestational week between the first gestational week to the one week before the ultrasound measurement date