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Table 3 Daily concentration of air pollutants and meteorological variables between October 12th 2000 and April 27th 2001.

From: Changes in deceleration capacity of heart rate and heart rate variability induced by ambient air pollution in individuals with coronary artery disease

Variable

N

Mean (± SD)

Min.

25%

Median

75%

Max.

IQR

Spearman correlation coefficient

         

PM 2.5

UFP

EC

OC

Temperature

Barometric pressure

PM2.5 [μg/m3]a

198

20.3 (± 14.8)

2.8

10.0

15.3

26.2

84.0

16.2

1

     

UFP [n/cm3]b

198

11639 (± 5849)

2485

6967

10717

15299

28369

8331

0.5

1

    

EC [μg/m3]c

113

2.3 (± 2.1)

0.2

0.9

1.6

2.7

10.4

1.8

0.8

0.7

1

   

OC [μg/m3]c

113

1.4 (± 0.6)

0.3

1.0

1.3

1.7

3.4

0.7

0.7

0.6

0.9

1

  

Temperature [°C]d

198

4.1 (± 4.8)

-10.8

-0.6

4.4

6.6

13.2

7.1

-0.5

-0.2

-0.4

-0.3

1

 

Barometric pressure [hPa]

198

973.2 (± 9.8)

949.8

966.2

972.9

980.0

995.6

13.7

0.3

0.1

0.2

0.1

-0.1

1

Relative humidity [%]d

198

83.5 (± 8.9)

56.5

78.5

84.5

89.1

100.0

10.6

0.5

0.2

0.4

0.3

-0.4

0.1

  1. SD: standard deviation; IQR: interquartile range; PM2.5: mass concentration of particles < 2.5 μm diameter; UFP: number concentration of particles between 0.01 and 0.1 μm diameter; EC, OC: elemental and organic carbon.
  2. a715 (15%) of the hourly measurements were imputed.
  3. b621 (13%) of the hourly measurements were imputed.
  4. cMeasurements started December 18th 2000.
  5. d24 (0.5%) of the hourly measurements were imputed.