Table 3.

Between-day variability – descriptive statistics of the non-transformed biomarker concentrations ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$) for the within-woman daily pooled samples from subgroup 1 and subgroup 2 (8 women, $n=56$ daily pools, one daily pool for each day of the first week of collection), and ICCs based on ${\log }_{10}\text{-transformed}$ phenol biomarker concentrations, creatinine concentration, and specific gravity. Values were not standardized for creatinine or specific gravity.

Biomarker	LOD ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$)	Results above the LOD, $N$ (%)	Percentiles					Between-day ICC (95% CI)a
			5th	25th	50th	75th	95th
Phenols ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$)b
2,4-Dichlorophenol	0.1	56 (100)	0.1	0.2	0.3	0.4	6.0	0.91 (0.82, 1.00)
2,5-Dichlorophenol	0.1	56 (100)	0.2	0.3	0.8	3.6	269.6	0.98 (0.95, 1.00)
Butyl paraben	0.1	45 (80)	0.1	0.1	0.2	1.1	35.2	0.80 (0.61, 0.99)
Ethyl paraben	1.0	39 (70)	$<\text{LOD}$	$<\text{LOD}$	2.8	12.9	45.5	0.85 (0.70, 1.00)
Methyl paraben	1.0	56 (100)	2.4	9.2	33.0	89.7	1350.8	0.84 (0.69, 1.00)
Propyl paraben	0.1	56 (100)	0.1	0.4	2.2	39.9	161.8	0.90 (0.80, 1.00)
Benzophenone-3	0.2	28 (50)	$<\text{LOD}$	$<\text{LOD}$	0.5	3.1	33.8	0.73 (0.50, 0.96)
Bisphenol A	0.1	56 (100)	0.4	1.0	1.9	3.5	8.2	0.60 (0.30, 0.89)
Bisphenol S	0.1	56 (100)	0.1	0.2	0.2	0.4	2.8	0.14 (0.00, 0.39)
Triclosan	1.0	45 (80)	$<\text{LOD}$	1.1	2.1	3.0	63.7	0.89 (0.78, 1.00)
Urine dilution markers
Creatinine (mg/dL)	NA	56 (100)	30.6	60.4	77.9	102.2	146.8	0.60 (0.30, 0.89)
Specific gravity	NA	56 (100)	1.009	1.013	1.016	1.02	1.029	0.61 (0.32, 0.90)

Note: CI, confidence interval; ICC, intraclass correlation coefficient; LOD, limit of detection; NA, not applicable.

^aICCs were estimated from ANOVA with a random effect on woman.

^bConcentrations below the LOD were replaced by instrumental reading values. For each phenol biomarker, instrumental reading values equal to 0 were replaced by the lowest non-zero instrumental reading value divided by the square root of 2.