Table 3.

Correlation coefficients (r) among urinary concentrations of OH-PAHs.

	2-NAP	2-FLU	3-FLU	9-FLU	1-PHE	2-PHE	3-PHE	4-PHE	1-PYR
1-NAP	0.366	0.239	0.252	0.341	0.689	0.388	0.396	0.277	0.077
2-NAP		0.903*	0.912	0.703	0.662	0.827	0.782	0.683	0.750
2-FLU			0.991	0.822	0.691	0.946	0.889	0.813	0.807
3-FLU				0.822	0.697	0.928	0.891	0.782	0.800
9-FLU					0.748	0.868	0.843	0.881	0.592
1-PHE						0.796	0.818	0.692	0.569
2-PHE							0.950	0.805	0.781
3-PHE								0.692	0.826
4-PHE									0.493

^*The numbers in bold indicate statistical significance (p < 0.001).