Pollutants
|
Exposure period
|
Mean ± SD
|
Interquartile range
|
Range
|
---|
PM10
|
Previous 1 year
|
50.5 ± 6.8
|
9.2
|
33.6–76.0
|
Previous 3 years
|
51.2 ± 6.4
|
10.1
|
33.8–74.2
|
Previous 5 years
|
52.3 ± 6.2
|
9.7
|
36.6–74.2
|
5 years before baselinea
|
55.7 ± 6.6
|
11.4
|
38.4–71.4
|
PM2.5
|
Previous 1 year
|
26.4 ± 3.1
|
4.2
|
18.0–38.1
|
Previous 3 years
|
27.5 ± 3.9
|
5.1
|
18.8–40.8
|
Previous 5 years
|
28.1 ± 3.6
|
5.5
|
19.0–39.8
|
5 years before baselinea
|
31.2 ± 3.4
|
4.5
|
21.2–39.8
|
- Abbreviations: PM10 particulate matter 10 μm or less in diameter. PM2.5 particulate matter 2.5 μm or less in diameter. SD standard deviation
- a5 years before baseline, 5-year average PM concentration for 2002–2006 before the baseline in 2007