Table 2.

Distribution of SG-corrected concentrations [ng/mL] of phenols, parabens and TCC in 577 urine samples (357 FMVs, 203 pools and 17 24-hour samples) collected from 173 pregnancies during the period of 2007-2014.

	LOD [ng/mL]	% detect	All samples			FMV	Pool	24-hr	FMV versus pools a	2013-2014 GM b	NHANES GM c
			Percentiles
			25th	50th	75th	50th	50th	50th
BPA	0.8	60	<LOD	1.0	1.7	0.9	1.2	1.3	<0.01	0.8	1.5
BPF	2.5	16	<LOD	<LOD	<LOD	<LOD	<LOD	<LOD	-	-	0.5
BPS	0.5	13	<LOD	<LOD	<LOD	<LOD	<LOD	<LOD	-	-	0.5
TCC	1.0	5	<LOD	<LOD	<LOD	<LOD	<LOD	<LOD	-	-	0.3
TCS	15.0	33	<LOD	<LOD	47.1	<LOD	<LOD	<LOD	-	-	18.4
BUPB	1.5	7	<LOD	<LOD	<LOD	<LOD	<LOD	<LOD	-	-	0.2
ETPB	0.5	47	<LOD	<LOD	3.9	<LOD	<LOD	<LOD	-	-	4.8
MEPB	0.5	95	13.6	39.4	115.3	38.0	42.7	51.1	0.43	18.9	174.4
PRPB	1.0	73	<LOD	7.8	25.0	7.1	8.4	23.5	0.62	4.6	24.6

Abbreviation: first morning void (FMV), geometric mean (GM), limit of detection (LOD), National Health and Nutrition Examination Survey (NHANES), specific gravity (SG), bisphenol A (BPA), bisphenol F (BPF), bisphenol S (BPS), triclocarban (TCC), triclosan (TCS), butyl paraben (BUPB), ethyl paraben (ETPB), methyl paraben (MEPB), propyl paraben (PRPB)

^aP-value from the Wilcoxon rank-sum test of the null hypothesis that two populations have the same distribution with the same median. Note that we did not compare medians of FMV versus 24-hour as well as pool versus 24-hour, because the sample size for 24-hour samples is small (n = 17)

^bUncorrected GM concentrations [ng/mL] of the pregnant women included in the current study who provided FMVs during 2013-2014 (n = 63). For values below LOD, we assigned a value of the LOD divided by the square root of 2 for GM computation.

^cUncorrected GM concentrations [ng/mL] of the pregnant women (20-44 years of age) reported in the 2013-2014 NHANES (n = 24).