Table 2.

Urinary concentrations of organophosphate insecticide metabolites (ng/ml, uncorrected for urinary creatinine) in men aged 20–55 years from NHANES 1999–2002 (n=356)

Biomarker	LOD by cycle		n (%) ≥LOD	GM	Percentiles
Biomarker	99–00	01–02	n (%) ≥LOD	GM	10^th	25^th	50^th	75^th	90^th	95^th	Max
DEP	0.2	0.2	204 (57)	0.8	<LOD	<LOD	0.8	3.5	8.4	15.0	51.9
DETP	0.09	0.1	226 (64)	0.4	<LOD	<LOD	0.5	1.2	2.3	3.2	26.4
DEDTP	0.05	0.1	104 (29)	0.1	<LOD	<LOD	<LOD	0.1	0.6	0.7	8.4
DMP	0.58	0.5	170(48)	1.0	<LOD	<LOD	<LOD	2.7	7.1	12.3	67.0
DMTP	0.18	0.4	187 (53)	1.3	<LOD	<LOD	0.6	6.0	29.5	40.8	900
DMDTP	0.08	0.1	118 (33)	0.2	<LOD	<LOD	<LOD	0.9	3.0	7.8	33.0
TCPY	0.4	0.4	296 (83)	1.7	<LOD	0.9	1.9	3.8	7.3	11.1	42.0

Abbreviations: GM, geometric mean; LOD, limit of detection.