Table 6A.

Concentrations (Geometric Mean) of Six Dialkylphosphate (DAP) Metabolites Detected in Child Urine in United States and Lower Yakima Valley, WA, compared to data from the National Health and Nutrition Examination Survey (NHANES), conducted by the U.S. Center for Disease Control's National Center for Health Statistics. Urinary metabolite concentrations are in units of nmol DAP/milliliter urine, without creatinine correction.

		NHANES 2005–06								UW Center for Child Environmental Health Risks Research
					50th Percentile			Sample		Thinning					Harvest				Non-Spray
OP Metabolite		GM	95% Cl		GM	95% Cl		Size		GM		95% Cl			GM		95% Cl		GM		95% Cl
DMP
Children 6–11		#			<LOD			350
FW
Children 2–6										0.045		(0.005–0.434)			0.03		(0.002–0.455)		0.016		(0.001–0.188)
NFW
Children 2–6										0.030		(0.004–0.241)			0.044		(0.003–0.705)		0.031		(0.003–0.309)
DMTP										1
Children 6–11		0.019	(0.016–0.023)		0.017	(0.012–0.024)		349
FW
Children 2–6												(0.017–0.861)			0.155		(0.016–1.480)		0.044		(0.005–0.352)
NFW
Children 2–6										0.050		(0.004–0.591)			0.118		(0.010–1.416)		0.050		(0.005–0.485)
DMDTP
Children 6–11		#			<LOD			350
FW
Children 2–6										0.015		(0.001–0.157)			0.008		(0.002–0.217)		0.004		(0.001–0.047)
NFW
Children 2–6										0.005		(0.001–0.052)			0.017		(0.001–0.349)		0.006		(0.001–0.043)
DEP
Children 6–11		#			<LOD			350
FW
Children 2–6										0.013		(0.001–0.199)			0.004		(C0.001–0.121)		0.004		(0.001–0.112)
NFW Children 2–6										0.012		(0.001–0.200)			0.008		(0.001–0.156)		0.014		(0.001–0.212)
DETP
Children 6–11		#			<LOD			350
FW
Children 2–6										0.004		(0.001–0.024)			0.002		(<0.001–0.0.7)		0.004		(0.001-0.004)
NFW
Childre n 2–6										0.004		(0.001–0.025)			0.006		(0.001–0.048)		0.005		(0.001-0.031)
DE DTP
Childre n 6–11		#			<LOD			317
FW
Childre n 2–6										0.001		(0.001-0.00^.			o		(CO.OOI-0.004)		0.001		(cO.OO1-0.005)
NFW
Children 2–6										0.001^1		(0.001-0.004)			0.001		(0.001-0.008)		0.001		(0.001-0.007)

# Geometric Mean was not calculated if the proportion of results below the limit of detection was greater than 40%.

"<LOD" means less than the limit of detection, which may vary by year and by individual sample.