Table 1.

Descriptive statistics of first and last void concentrations of urinary metabolites adjusted for specific gravity from 23 children.

Metabolite	Void	Total no. of urine samples	LOD (μg/L)	Detection frequency (%)	Percentile
					25th	50th	75th	95th	100th
Pyrethroid
PBA	First	616	0.1	91	0.5	1.1	1.5	4.5	61.2
	Last	599	0.1	85	0.3	1.0	1.4	4.1	26.5
4F3PBA	First	599	0.2	16	< LOD	< LOD	< LOD	1.1	2.3
	Last	599	0.2	13	< LOD	< LOD	< LOD	1.0	61.2
cis-DCCA	First	599	0.2	37	< LOD	< LOD	0.7	1.7	46.0
	Last	599	0.2	32	< LOD	< LOD	0.4	1.3	4.6
trans-DCCA	First	599	0.4	55	< LOD	0.9	1.4	4.4	97.1
	Last	599	0.4	49	< LOD	0.6	1.3	3.9	27.7
DBCA	First	599	0.1	3	< LOD	< LOD	< LOD	< LOD	0.3
	Last	599	0.1	4	< LOD	< LOD	< LOD	< LOD	0.8
OP
MDA	First	616	0.3	57	< LOD	0.8	3.0	13.8	433.8
	Last	599	0.3	52	< LOD	0.6	3.2	16.9	283.8
TCPy	First	616	0.2	87	1.0	3.8	6.8	13.0	43.8
	Last	599	0.2	81	0.8	3.2	6.0	12.2	69.5
IMPy	First	600	0.7	3	< LOD	< LOD	< LOD	< LOD	16.2
	Last	586	0.7	4	< LOD	< LOD	< LOD	< LOD	31.4
DEAMPy	First	597	0.2	10	< LOD	< LOD	< LOD	0.6	26.7
	Last	593	0.2	18	< LOD	< LOD	< LOD	1.5	50.2
Abbreviations: DBCA, cis-2,2-(dibromo)-2-dimethylvinyl-cyclopropane carboxylic acid; cis-DCCA, cis-2,2-(dichloro)-2-dimethylvinylcyclopropane carboxylic acid; trans-DCCA, trans-2,2-(dichloro)-2-dimethylvinylcyclopropane carboxylic acid; DEAMPy, 2-diethylamino-6-methyl-pyrmidin-4-ol; IMPy-2-isopropyl-4-methyl-6-hydroxypyrimidinol); MDA, malathion dicarboxylic acid; OP, organophosphorus; PBA, 3-phenoxybenzoic acid; 4F3PBA, 4-fluor-3-phenoxybenzoic acid; 3,5,6-trichloro-2-pyridinol; TCPy, 3,5,6-trichloro-2-pyridinol.