. Author manuscript; available in PMC: 2008 Apr 10.

Published in final edited form as: J Occup Environ Hyg. 2007 Nov;4(11):848–854. doi: 10.1080/15459620701643347

TABLE IV.

Spearman Rho Correlations for EPA AIRS Data and Observed Particle Concentrations

	Terminal Background Value			LH Personal Samples^A			P&D Personal Samples^A
	EC	OC	PM_2.5	EC	OC	PM_2.5	EC	OC	PM_2.5
Terminal background value				0.2	0.4	0.3	0.5	0.4	0.4
Mean AIRS PM_2.5 within 50 km	0.4	0.6	0.8	0.2	0.3	0.3	0.1	0.4	0.4
Mean AIRS PM_2.5 within 100 km	0.3	0.5	0.7	0.2	0.3	0.3	0.1_NS	0.3	0.4
Mean AIRS CO within 50 km	0.5	0.3	0.1	0.4	0.1_NS	0.2	0.4	0.0_NS	0.1_NS

Notes: The top row correlates upwind terminal background values with personal samples matched by time and date. The other three rows correlate weekly means of study data with weekly means of AIRS data. Correlations not significant (p > 0.05) are subscripted with NS.

Nonsmoking drivers only.