Table 6.

Measures of reproducibility for urinary phthalate metabolite concentrations.

Phthalate Metabolite (μg/g creatinine)	Males				Females

	n	ICC¹ (95% CI)		Spearman correlation coefficient²	n	ICC¹ (95% CI)		Spearman correlation coefficient²

MBP	48	0.30	(0.14, 0.45)	0.26	48	0.15	(0.02, 0.30)	0.24
MiBP	48	0.21	(0.07, 0.36)	0.26	48	0.16	(0.02, 0.30)	0.06
MEP	48	0.15	(0.01, 0.30)	0.17	48	0.15	(0.02, 0.30)	0.00
MBzP	48	0.18	(0.04, 0.32)	0.05	48	0.11	(-0.01, 0.24)	0.08
MCOP	48	0.01³	(-0.15, 0.09)	0.21	48	0.09	(-0.01, 0.21)	0.11
MCPP	48	0.18	(0.05, 0.32)	0.14	48	0.11	(0.00, 0.24)	0.14
MECPP	48	0.06	(-0.07, 0.20)	0.21	48	0.13	(-0.01, 0.28)	0.25
MEHHP	48	0.05	(-0.08, 0.19)	0.26	48	0.04	(-0.09, 0.19)	0.09
MEHP	48	0.20	(0.06, 0.35)	0.43	48	0.20	(0.06, 0.35)	0.21
MEOHP	48	0.04	(-0.08, 0.19)	0.21	48	0.04	(-0.09, 0.18)	0.11
ΣLMWP⁴	48	0.14	(0.01, 0.28)	0.22	48	0.03	(-0.08, 0.15)	-0.02
ΣHMWP⁴	48	0.03	(-0.10, 0.17)	0.21	48	0.07	(-0.06, 0.22)	0.13
ΣDEHP⁴	48	0.05	(-0.08, 0.20)	0.25	48	0.07	(-0.06, 0.22)	0.12
ΣDBP⁴	48	0.26	(0.12, 0.41)	0.28	48	0.12	(0.01, 0.25)	0.20

Abbreviations: confidence interval (CI), intraclass correlation coefficient (ICC), mono-n-butyl phthalate (MBP), mono-isobutyl phthalate (MiBP), monoethyl phthalate (MEP), monobenzyl phthalate (MBzP), mono(carboxyoctyl) phthalate (MCOP), mono(3-carboxypropyl) phthalate (MCPP), mono(2-ethyl-5-carboxypentyl) phthalate (MECPP), mono(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP), mono(2-ethylhexyl) phthalate (MEHP), mono(2-ethyl-5-oxohexyl) phthalate (MEOHP), low molecular weight phthalate sum (ΣLMWP), high molecular weight phthalate sum (ΣHMWP), di(2-ethylhexyl) phthalate sum (ΣDEHP), dibutyl phthalate sum (ΣDBP).

Sample 1, sample 2, and sample 3

Sample 1 and the average of samples 2 and 3

As described in the Methods, a negative estimate was obtained but replaced by an arbitrarily small value in this instance.

⁴

Molar sums; units are nanomoles per gram creatinine.