From: Secondhand tobacco smoke exposure and heart rate variability and inflammation among non-smoking construction workers: a repeated measures study
Characteristic
Mean
SD
Q25
Q50
Q75
PM2.5 Exposure(μg/m3)
132.3
124.1
42.9
79.8
177.4
Time weighted average(μg/m3)
103.8
100.2
32.2
59.9
133.1
PM2.5 measurement time(min)
349
18.6
347
360