Table 2.

Distributions of Urinary PAHs Metabolites Concentrations

		GM (95% CI)		Selected Percentiles
	N	Crude	%≥LOD	25th	50th	75th	95th
1-hydroxypyrene (μg/L)
Total	6418	0.15 (0.14–0.16)	97.1	0.09	0.14	0.25	0.60
Mena	2745	0.18 (0.17–0.19)	98.1	0.1	0.18	0.32	0.76
Women	3673	0.13 (0.12–0.14)***	96.4	0.08	0.13	0.21	0.56
Smoking status
Nevera	4226	0.12 (0.12–0.13)	96.4	0.08	0.13	0.21	0.49
Former	1046	0.15 (0.14–0.16)***	97.7	0.09	0.14	0.23	0.57
Current	1146	0.27 (0.25–0.28)***	99.2	0.16	0.28	0.44	0.9
2-naphthol (μg/L)
Total	6410	2.23 (2.11–2.35)	98.8	0.83	1.91	5.32	19.9
Mena	2750	3.02 (2.82–3.25)	99.3	1.09	2.93	8.5	23.1
Women	3660	1.64 (1.54–1.76)***	98.4	0.71	1.46	3.53	14.3
Smoking status
Nevera	4210	1.52 (1.43–1.61)	98.5	0.68	1.39	3.23	12.6
Former	1049	1.76 (1.60–1.92)**	98.7	0.8	1.66	3.85	17.1
Current	1151	7.93 (7.39–8.52)***	100.0	4.51	8.8	14.7	30.7
1-hydroxyphenanthrene (μg/L)
Total	6413	0.10 (0.09–0.10)	79.0	0.05	0.09	0.16	0.38
Mena	2746	0.11 (0.10–0.11)	82.9	0.06	0.11	0.19	0.45
Women	3667	0.09 (0.08–0.09)***	76.1	0.05	0.08	0.14	0.39
Smoking status
Nevera	4220	0.08 (10.08–0.09)	75.8	0.05	0.08	0.14	0.33
Former	1047	0.09 (0.09–0.10)*	78.4	0.05	0.09	0.16	0.40
Current	1146	0.14 (0.13–0.15)***	91.5	0.09	0.14	0.24	0.48
2-hydroxyfluorene (μg/L)
Total	6397	0.27 (0.25–0.28)	92.9	0.12	0.24	0.51	1.86
Mena	2735	0.40 (0.37–0.43)	95.7	0.17	0.38	1.00	2.38
Women	3662	0.18 (0.17–0.19)***	90.8	0.09	0.19	0.35	1.00
Smoking status
Nevera	4216	0.18 (0.17–0.19)	91.1	0.10	0.19	0.33	0.80
Former	1045	0.22 (0.20–0.24)***	93.6	0.12	0.23	0.42	1.11
Current	1136	1.01 (0.93–1.09)***	99.1	0.62	1.13	1.82	3.32

Notes: ^aReference for comparison of geometric mean in each variable. ***P<0.001, **P<0.01, *P<0.05.

Abbreviations: BMI, body mass index; CI, confidence interval; GM, geometric mean; LOD, limit of detection.