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Table 3 Average measured1 and modelled2 winter mean levels of NO2, presented separately for each city.

From: Perceived annoyance and asthmatic symptoms in relation to vehicle exhaust levels outside home: a cross-sectional study

 

Umea

Uppsala

Gothenburg

Modelled level at central monitoring site (μg/m3)

20.3

17.6

28.5

Measured level at central monitoring site (μg/m3)

   

2001–2002

NAa

13.0

27.3

2002–2003

22.8

17.0

31.8

2003–2004

18.1

15.0

27.1

2004–2005

21.7

15.3

27.7

Modelled levels of NO2 (μg/m3) at each study subjects home address (IQRb, Min-Max c)

16.9 (4.4) (11.5–24.9)

16.2 (2.8) (9.6–25.9)

29.7 (7.7) (16.5–53.9)

  1. aNA = not applicable: no measurements available; bIQR = Inter Quartile Range; cMinimum and maximum value.
  2. 1 Urban background levels of NO2 measured at a central monitoring station within each city.
  3. 2 Calculated with a meteorological dispersion model within each city.
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Environmental Health

ISSN: 1476-069X