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. Author manuscript; available in PMC: 2016 Nov 21.

Published in final edited form as: Res Rep Health Eff Inst. 2012 Dec;(172):5–82.

Table 20.

Correlations^a of TWA VOCs with EC and PM_2.5 for Nonsmoking P & D Drivers

Compound	EC	PM_2.5
Trimethylpentane	0.29^b	0.18^b
Dimethylpentane	0.30^b	0.18^b
2-Methylhexane	0.27^b	0.23^b
Methylpentane	0.21^b	0.17^b
3-Methylhexane	0.28^b	0.23^b
Methylcyclohexane	0.30^b	0.34^b
Hexane	− 0.01	0.01
1,3-Butadiene	0.15^b	0.22^b
Benzene	0.42^b	0.47^b
Ethylbenzene	0.38^b	0.35^b
m&p-Xylenes	0.37^b	0.37^b
o-Xylene	0.42^b	0.34^b
Styrene	0.23^b	0.17^b
Toluene	0.31^b	0.23^b
MTBE	0.12	0.45^b
Acetone	0.07	− 0.18
Acetaldehyde	0.01	− 0.10
Formaldehyde	0.18^b	− 0.09

^a

Nonparametric Spearman correlation coefficients.

^b

Significant at the 5% level.