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Table 2 Exposure details on PM2.5 and NO2 air pollution (μg/m3) during different time windows of pregnancy and different periods during the childhood of the participants (n = 245)

From: Children’s microvascular traits and ambient air pollution exposure during pregnancy and early childhood: prospective evidence to elucidate the developmental origin of particle-induced disease

Type of air pollution exposure and time window

Mean (SD)

25th percentile

75th percentile

IQR

PM2.5

 Pregnancy

  Trimester 1

14.3 (5.5)

9.6

18.2

8.6

  Trimester 2

14.2 (5.1)

9.6

17.9

8.3

  Trimester 3

14.2 (5.7)

9.1

18.3

9.2

  Entire pregnancy

14.3 (2.3)

12.6

15.8

3.2

 Childhood

  Day of follow-up visit

11.2 (8.3)

4.8

15.1

10.3

  Day before follow-up visit

12.1 (10.2)

4.5

15.9

11.4

  Week before follow-up visit

13.0 (7.5)

7.3

17.7

10.4

  Average childhood exposure

12.6 (1.1)

11.9

13.3

1.4

NO2

 Pregnancy

  Trimester 1

19.9 (6.0)

15.2

24.3

9.1

  Trimester 2

19.8 (6.2)

15.0

24.1

9.1

  Trimester 3

19.6 (6.2)

14.7

23.7

9.0

  Entire pregnancy

19.7 (4.4)

16.5

22.7

6.2

 Childhood

  Day of follow-up visit

17.0 (8.7)

10.5

21.3

10.8

  Day before follow-up visit

17.2 (9.5)

9.7

22.8

13.1

  Week before follow-up visit

17.2 (7.2)

11.7

21.7

10.0

  Average childhood exposure

17.2 (3.4)

14.6

19.3

4.7

  1. Abbreviations: IQR interquartile range, NO2 nitrogen dioxide, PM2.5 particulate matter with a diameter smaller than 2.5 μm, SD standard deviation