Table 5.

Alternative estimate of between-week variability based on three random spot samples – descriptive statistics of the non-transformed biomarker concentrations ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$) for the random spot samples from subgroup 1 and subgroup 2 (8 women, $n=24$ random spot samples, one sample in each of the three weeks 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-week ICC (95% CI)a
			5th	25th	50th	75th	95th
Phenols ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$)b
2,4-Dichlorophenol	0.1	24 (100)	0.1	0.2	0.4	0.5	2.2	0.50 (0.08, 0.92)
2,5-Dichlorophenol	0.1	23 (96)	0.1	0.3	0.8	1.4	70.3	0.85 (0.69, 1.00)
Butyl paraben	0.1	19 (79)	0.1	0.1	0.1	3.8	8.0	0.42 (0.00, 0.87)
Ethyl paraben	1.0	16 (67)	$<\text{LOD}$	$<\text{LOD}$	2.4	10.5	21.1	0.40 (0.00, 0.85)
Methyl paraben	1.0	24 (100)	2.3	5.0	15.4	106.3	276.7	0.85 (0.68, 1.00)
Propyl paraben	0.1	24 (100)	0.1	0.5	4.2	34.5	99.3	0.70 (0.40, 1.00)
Benzophenone-3	0.2	13 (54)	$<\text{LOD}$	$<\text{LOD}$	0.8	4.5	47.4	0.28 (0.00, 0.75)
Bisphenol A	0.1	23 (96)	0.1	0.4	1.1	2.6	8.0	0.38 (0.00, 0.83)
Bisphenol S	0.1	22 (92)	0.1	0.1	0.2	0.4	12.3	0.33 (0.00, 0.80)
Triclosan	1.0	13 (54)	$<\text{LOD}$	$<\text{LOD}$	1.1	2.4	29.9	0.11 (0.00, 0.58)
Urine dilution markers
Creatinine (mg/dL)	NA	24 (100)	13.90	28.65	67.43	125.94	156.25	0.54 (0.14, 0.94)
Specific gravity	NA	24 (100)	1.005	1.007	1.016	1.021	1.029	0.69 (0.39, 1.00)

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. For triclosan analysis, an extreme value was excluded ($n=23$ samples).

^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.