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. Author manuscript; available in PMC: 2017 Jul 1.
Published in final edited form as: Occup Environ Med. 2016 Apr 6;73(7):435–441. doi: 10.1136/oemed-2015-103256

Table 2.

Personal PM2.5 concentrations (μg/m3) from DustTrak aerosol monitor over the monitoring period

Lag 0* Lag 6**
N Median Mean(SD) Q25, Q75 N Median Mean(SD) Q25, Q75
Entire period 2993 41 274 (754) 13, 186 2356 48 300 (48) 14, 229
Not working 2331 26 123 (496) 10, 70 1765 28 154 (581) 10, 84
Working 662 420 804 (1162) 146, 1104 591 404 736 (909) 143, 1060
Smokers 1124 79 422 (1077) 26, 354 866 111 456 (1004) 26, 354
Non-smokers 1869 28 185 (439) 10, 103 1490 32 209 (471) 10, 128
*

Lag 0 represents concurrent exposure and arrhythmia monitoring.

**

Lag 6 is the exposure in the 6 hours prior to ectopy monitoring.