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Table 2 Description of personal 5-minute particle measurements from 191 study visits and 1 hour of ambient particle measurements and meteorology recorded between March 2007 and December 2008

From: Elevated particle number concentrations induce immediate changes in heart rate variability: a panel study in individuals with impaired glucose metabolism or diabetes

 

N

Mean ± SD

Min

25%

Median

75%

Max

IQR

Personal measurements of PNC (5-minute averages)

PNC [N/cm3]

11,872

20,822 ± 39,233

521

6,354

11,134

21,987

698,225

15,633

Ambient measurements at stationary monitoring site (1-hour averages)

UFP [N/cm3]

14,699

9,518 ± 6,902

937

4,892

7,629

12,049

80,858

7,157

ACP [N/cm3]

14,699

2,060 ± 1,535

88

1,020

1,657

2,615

17,377

1,595

PM10 [μg/m3]

15,466

18.3 ± 14.1

0.0

8.4

15.3

24.4

159.8

16.0

PM2.5 [μg/m3]

15,461

13.7 ± 11.2

0.0

5.8

10.9

18.1

106.5

12.3

Air temperature [°C]

15,398

10.8 ± 7.9

−8.4

4.7

10.8

16.5

33.8

11.8

Relative humidity [%]

15,398

76.9 ± 18.3

21.0

63.3

81.3

92.8

100.0

29.5

  1. SD: standard deviation, IQR: interquartile range, PNC: Particle number concentrations, PM10: particulate matter with an aerodynamic diameter <10 μm, PM2.5: particulate matter with an aerodynamic diameter <2.5 μm, ACP: accumulation mode particles (100–800 nm), UFP: ultrafine particles (10-100 nm).