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Table 1 Descriptive data on daily PM2.5 mass and four PM2.5 component concentrations, gaseous pollutants, meteorology and daily mortality counts in the 5-county Denver metropolitan region from 2003 through 2007

From: The short-term association of selected components of fine particulate matter and mortality in the Denver Aerosol Sources and Health (DASH) study

  

N

Mean

SD*

Minimum

Median

Maximum

IQR*

Pollutant

PM2.5

1808

7.98

5.08

−0.92

6.87

59.41

4.54

(μg/m3)+

EC*

1809

0.47

0.33

0.00

0.40

3.02

0.33

 

OC*

1809

3.09

1.39

−0.78

2.91

10.28

1.67

 

Sulfate

1808

1.08

0.97

0.00

0.91

14.32

0.76

 

Nitrate

1808

1.03

1.97

−0.02

0.22

19.72

0.86

Gaseous

CO* (ppm)

1779

1.47

0.97

0.40

1.20

15.00

0.80

pollutant+

SO2* (ppb)

1675

10.53

7.66

0.00

9.00

60.00

9.00

 

NO2* (ppb)

1578

46.91

14.33

9.00

46.00

136.00

18.00

 

Ozone (ppb)

1729

39.70

16.97

0.00

40.25

108.63

24.63

Weather+

Temperature (deg F)

1813

51.09

17.43

−4.60

51.50

85.40

27.75

 

Relative humidity (%)

1813

54.62

20.77

14.25

51.83

100.00

30.46

Mortality

Total

1826

33.2

6.2

14

33

54

8

(N)

Cardiovascular

1826

11.0

3.4

2

11

27

4

 

Ischemic heart disease

1826

1.6

1.3

0

1

8

1

 

Respiratory

1826

3.9

2.1

0

4

14

3

 

Cancer

1826

8.4

2.9

1

8

20

4

  1. *SD = standard deviation; IQR = inter-quartile range ; EC = elemental carbon; OC = organic carbon; CO = carbon monoxide; NO2; nitrogen dioxide; SO2 = sulfur dioxide
  2. +PM2.5, four PM2.5 components, and meteorology were measured at the DASH site, whereas gaseous pollutants were collected at two EPA sites in Fig. 1
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Environmental Health

ISSN: 1476-069X