Exposure to wood smoke increases arterial stiffness and decreases heart rate variability in humans

Table 3 Wood smoke exposure characteristics

	Unit	Average	Stdev	Max	Min	Exposure variation ^*
PM₁ mass conc. (TEOM)	μg/m³	314	38^**	356^***	232^***	200-400
PM₁ mass conc. (filter)	μg/m³	294	36	351	246
CO	ppm	25	6	35^***	16^***	10-40
NO_x	ppm	0.41	0.12	0.65^***	0.26^***	0.2-0.7
EC/TC (elemental/total carbon)		0.72	0.08	0.84	0.57
Organic fraction of total PM₁ ^****	%	24	8.0	40	16
Soot fraction of total PM₁ ^*****	%	38	9.9	53	28
PAH - PM associated (from filter)	μg/m³	0.78	0.56	1.94	0.18
PAH - semi-volatile (from PUF)	μg/m³	0.28	0.12	0.53	0.14

^* Typical variation interval during an exposure for the continuous measurements.
^** Standard deviation of the average TEOM data from each exposure.
^*** Max and min of the average from each exposure.
^**** Estimated based on the OC analysis and TEOM (assuming OC*1.8 in total organic PM weight).
^***** Estimated based on the EC analysis and TEOM (assuming EC*1.1 in total soot PM weight).

ISSN: 1743-8977