Table 3.

Distributions of average phthalate metabolite concentrations in maternal urine (ng/mL) (as medians and 25th and 75th percentiles).

Phthalate metabolite	$n$	Median	25th P	75th P	IQR
MEP	780	37.3	16.1	88.1	72.0
MBP	780	8.99	5.60	14.5	8.91
MBzP	780	4.49	2.25	8.85	6.60
MiBP	780	5.97	3.67	9.94	6.26
MCPP	780	2.03	1.19	4.41	3.21
MCOP	769	15.7	7.51	34.7	27.2
MCNP	769	2.45	1.58	4.19	2.60
ΣDEHPa	780	0.09	0.06	0.13	0.07

Note: Phthalate metabolite concentrations were corrected for urinary specific gravity prior to averaging. IQR, interquartile range; MBP, mono-$n$-butyl phthalate; MBzP, monobenzyl phthalate; MCNP, monocarboxy-isononyl phthalate; MCOP, monocarboxyoctyl phthalate; MCPP, mono(3-carboxypropyl) phthalate; MEP, mono-ethyl phthalate; MiBP, mono-isobutyl phthalate; P, percentile; $\mathrm{\Sigma }\text{DEHP}$, summed di-2-ethylhexyl phthalate.

^a Units are in nanomoles per milliliter.