Table 2.

Percent detected and distribution of urinary phthalate metabolites (ng/mL).

Metabolite1	n	% Detected	25%	50%	75%	95%
MEP
US-born	9931	99.9%	25.61	72.01	223.08	1219.42
Foreign-born	3432	99.9%	29.60	87.32	299.31	1672.60
MnBP
US-born	9936	98.2%	6.80	15.30	30.50	87.60
Foreign-born	3432	98.0%	7.30	16.60	35.10	102.10
MiBP
US-born	8891	93.8%	2.20	5.00	10.64	28.00
Foreign-born	3018	95.8%	3.20	6.90	14.10	40.76
MCPP
US-born	8891	95.7%	1.10	2.50	5.10	17.30
Foreign-born	3018	93.4%	0.90	2.10	4.30	16.00
MBzP
US-born	9936	98.2%	2.81	6.98	15.98	52.13
Foreign-born	3432	97.5%	2.30	5.40	12.40	38.70
MEHP
US-born	9936	69.3%	–	1.80	4.70	22.70
Foreign-born	3432	73.1%	–	2.20	5.20	25.30
MEHHP
US-born	8891	99.3%	5.76	13.30	30.50	147.90
Foreign-born	3018	99.3%	5.50	12.20	26.30	120.70
MEOHP
US-born	8891	98.6%	3.70	8.40	19.07	84.10
Foreign-born	3018	98.6%	3.40	7.66	16.64	73.80
ΣDEHP2
US-born	8891	–	0.037	0.083	0.19	0.88
Foreign-born	3018	–	0.035	0.078	0.16	0.75

¹Metabolites were included in this analysis only if they were measured in at least 7 cycles and detected in at least 75% of samples across cycles, or are a metabolite of DEHP. Parent phthalates are as follows: diethyl phthalate (parent of MEP); di-n-butyl phthalate (parent of MnBP); di-isobutyl phthalate (parent of MiBP); di-n-octyl phthalate (parent of MCPP); butyl benzyl phthalate (parent of MBzP); and DEHP (parent of MEHP, MEHHP, and MEOHP).

² $\sum \text{DEHP}=\left(\left(\frac{\mathit{MEHP}}{278.34}\right)+\left(\frac{\mathit{MEHHP}}{294.34}\right)+\left(\frac{\mathit{MEOHP}}{292.33}\right)\right)$.