. 2014 Nov 12;48(24):14695–14702. doi: 10.1021/es503866a

Table 1. Distribution of Mn Levels in Biological and Environmental Media^a.

biomarker (units)	time period	N	min	25th	50th	75th	max	GM (GSD)
dentin (Mn:Ca AUC × 10 000)	second trimester	57	0.18	0.46	0.59	0.74	1.86	0.60 (1.5)
	third trimester	60	0.01	0.24	0.32	0.46	1.21	0.33 (2.0)
	prenatal	62	0.15	0.35	0.48	0.57	1.34	0.51 (1.5)
	postnatal	61	0.03	0.10	0.14	0.22	1.15	0.16 (2.0)

enamel (Mn:Ca AUC × 10 000)	second trimester	58	0.10	0.18	0.27	0.42	1.35	0.30 (1.9)
	third trimester	60	0.09	0.19	0.30	0.47	1.37	0.31 (2.0)
	prenatal	61	0.10	0.18	0.28	0.51	1.31	0.30 (1.8)
	postnatal	37	<LOD	0.11	0.16	0.19	1.09	0.16 (1.8)

blood (μg/L)	26 weeks gestation	53	4.34	12.5	14.8	18.5	32.8	14.6 (1.5)
blood (μg/L)	delivery	53	6.66	16.5	20.3	27.9	35.7	20.7 (1.4)
	cord	59	20.74	31.4	40.5	50.6	72.4	39.9 (1.4)
	child 24 months	37	11.04	17.5	25.2	32.8	50.1	25.0 (1.5)

urine (μg/L)	26 weeks gestation	59	0.07	0.2	0.4	0.6	7.3	0.5 (2.4)
urine (μg/L)	child 24 months	39	<LOD	0.3	0.6	1.1	16.1	0.8 (3.6)

house dust concentration (μg/g)	18 weeks gestation	46	37	135	170	200	414	153 (1.7)

house dust loading (μg/m²)	18 weeks gestation	46	6.2	193	619	1,720	18,400	511 (5.9)

GM = geometric mean; GSD = geometric standard deviation; LOD = limit of detection.

Table 1. Distribution of Mn Levels in Biological and Environmental Mediaa.