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Table 4 Geometric Mean (GM) and Geometric Standard Deviation (GSD) of total Hopanes concentrations in the study population, by room, by home and correlation a with city-specific modeled NO 2

From: A new exposure metric for traffic-related air pollution? An analysis of determinants of hopanes in settled indoor house dust

City

Homes

Hopanes concentration (ng/mg)

Pearson correlation

N (number of homes)

Bedroom

Family room

Average

Between NO2and family room

n

GM (GSD)

n

GM (GSM)

N

GM (GSD)

r (p-value)

Winnipeg (CHILD)

26

23

4.9 (2.1)

21

5.8 (2.1)

40

5.3 (2.3)

0.04 (n.s.)

Edmonton (CHILD)

15

12

4.7 (2.7)

14

4.1 (2.0)

26

4.5 (2.3)

0.58 (0.03)

Vancouver (CHILD)

65

56

7.4 (2.2)

54

6 (2.9)

90

6.7 (2.6)

-0.12 (n.s.)

Toronto (CHILD)

14

13

5.9 (1.9)

12

7.7 (2.9)

22

6.6(2.3)

0.02 (n.s.)

Windsor (WOAES)

27

NA

27

5.1 (1.8)

NA

0.44(0.02)

Toronto (TCHEQ)

24

NA

24

4 (2.5)

NA

0.18 (n.s.)

  1. Abbreviations: n total number of samples, n.s. not statistically significant association.