Table 1.

Summary of CEF exposure conditions during exposure sessions.

Table 1. Summary of CEF exposure conditions during exposure sessions.
Exposure condition		PM2.5 mass (μg/m3)		PM number (no./cm3)		Carbon monoxide (ppm)		Nitric oxide (ppm)		Nitrogen dioxide (ppm)
DE exposure (n = 79)
Mean		277		64,111		3.7		3.17		0.21
SD		20.3		16,718		0.85		1.04		0.28
Range		210–337		33,097–107,235		2.20–6.10		1.00–6.3		0.07–1.96
CA exposure (n = 78)
Mean		6.69		4,095		0.93		0.01		0.007
SD		6.20		2,487		0.19		0.02		0.005
Range		1.0–31		745–16,538		0.50–1.93		0.00–0.13		0.00–0.03