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. Author manuscript; available in PMC: 2017 Mar 30.
Published in final edited form as: J Toxicol Environ Health A. 2016 Mar 30;79(6):287–298. doi: 10.1080/15287394.2016.1157539

Table 2.

Distribution of 1 hour and 24 hour mean pollutant concentrations for each subject.

Pollutant Averaging
Time		 N Mean ± SD Min. 5th
Percentile		 25th
Percentile		 50th
Percentile		 75th
Percentile		 95th
Percentile		 Max.
PM2.5
(µg/m3)		 1 hour 108 7.2 ± 4.3 0.0 1.1 4.2 6.9 10.4 15.8 17.7
24 hour 102 7.0 ± 3.5 2.1 2.9 4.8 6.7 9.0 12.8 22.2
Black Carbon
(µg/m3)		 1 hour 118 1.2 ± 0.6 0.2 0.3 0.6 1.1 1.5 2.8 3.2
24 hour 118 0.9 ± 0.8 0.3 0.5 1.0 1.3 1.5 2.4 3.9
Ultrafine
particles
(p/cm3)		 1 hour 108 3,872 ± 3,823 310 615 1,782 3,125 4,697 9,545 23,118
24 hour 108 3,102 ± 2,541 645 784 1,745 2,489 3,660 6,801 11,721
Accumulation
mode
particles
(p/cm3)		 1 hour 108 698 ± 572 78 162 305 572 844 1,855 2,811
24 hour 108 691± 468 201 278 391 512 962 1,399 1,747