Table 3.

Concentrations of urinary metabolites (specific gravity adjusted) of polycyclic aromatic hydrocarbons among exposed and unexposed groups.

All participants	Chimney sweeps				Controls
	n e	Median	Min	Max	n e	Median	Min	Max	P f
1-OH-PYRa	148	0.56	0.03	7.49	151	0.07	0.00	1.25	<0.001
2-OH-PHb	148	0.78	0.09	14.56	151	0.18	0.05	4.01	<0.001
3-OH-BaPc	132	4.75	0.00	42.86	130	1.38	0.00	16.51	<0.001
3-OH-BaAd	142	6.28	0.46	71.70	144	1.99	0.04	20.88	<0.001
Only non-smokers
1-OH-PYR	95	0.50	0.03	7.17	123	0.07	0.005	0.53	<0.001
2-OH-PH	95	0.68	0.09	14.56	123	0.16	0.05	4.01	<0.001
3-OH-BaP	90	4.18	0.00	31.89	105	1.18	0.00	16.51	<0.001
3-OH-BaA	92	5.53	0.46	71.70	117	1.80	0.04	8.12	<0.001

^a1-hydroxypyrene (µg/L), ^b2-hydroxyphenanthrene (µg/L), ^c3-hydroxybenzo[a]pyrene (ng/L). ^d3-hydroxybenzo[a]anthracene (ng/L). ^eThe number of samples with valid concentrations for 3-OH-BaP and 3-OH-BaA was lower, compared with other two metabolites, due to their low concentrations in urine. ^fGeneral linear model adjusted for age, BMI and smoking status.