Table 2.

Urinary concentrations of DEHP and DEHTP metabolites in a convenience sample of U.S. adults

Parent chemical	Urinary metabolite	Collection year	N	Select percentilesb (ng/mL)				Frequency of detection (%)	Geometric Meanb (ng/mL)	Median unconjugated metabolitec,d (%)
				25th	Median	75th	90th
DEHP	MEHHP	2016	149	1.8	4.3	10.2	19.0	100	4.1	1.9
		2013	92	2.2	4.9	9.4	16.2	100	4.3
		2011	81	17	4.2	10.2	22.0	100	4.1
		2009	61	2.7	5.1	13.5	21.5	100	5.9
		2000	44	4.8	11.2	22.5	30.0	100	8.7
	MECPP	2016	149	2.6	6.6	15.3	30.9	100	6.7	45.5
		2013	92	4.6	7.9	15.9	29.6	100	7.8
		2011	81	4.0	7.3	17.9	41.5	100	9.3
		2009	61	5.9	10.9	11.6	32.6	100	10.1
		2000	44	6.7	16.6	28.0	37.9	100	12.1
DEHTP	MEHHTP	2016	149	1.1	3.0	7.6	22.5	91	3.1	21.2
		2013	92	0.6	1.1	3.0	7.1	77	1.3
		2011	81	<LODa	<LOD	1.1	4.5	44	<LOD
		2009	61	<LOD	<LOD	0.6	1.8	34	<LOD
		2000	44	<LOD	<LOD	<LOD	1.2	7	<LOD
	MECPTP	2016	149	4.5	15.7	37.1	92.2	100	13.1	98.8
		2013	92	2.1	4.8	10.8	44.6	95	4.6
		2011	81	1.5	2.0	4.8	14.1	86	2.0
		2009	61	<LOD	<LOD	0.6	1.1	38	<LOD
		2000	44	<LOD	<LOD	<LOD	1.3	18	<LOD

^aLOD-limit of detection; LOD-0.4 ng/mL for both MEHHTP and MECPTP

^b<LOD was treated as LOD√2

^cOnly total concentrations >LOD were used in the calculation

^dOnly urine samples collected in 2016 were analyzed without β-glucuronidase for unconjugated metabolites