Table 5A.

Proportions (Geometric Mean) and Detection Frequencies of Three Dimethylalkylphosphate (DMAP) Metabolites Detected in Child Urine in Lower Yakima Valley, WA. Farmworker (FW) and non-farmworker (NFW) urinary metabolite concentrations are in units of nmol DAP/milliliter urine.

Urinary Metabolite	Thinning Season				Harvest Season				Non-Spray Season
	Geometric				Geometric				Geometric
DMP	n	% Detect	Mean (%)	95% CI	n	% Detect	Mean (%)	95% CI	n	% Detect	Mean (%)	95% CI
FW	85	96%	22.7**	5.9–86.9	82	94%	13.9**	2.5–75.5	78	83%	22.2*	5.1–96.2
NFW	85	98%	32.4	12.2–85.8	88	92%	22.2	5.1–97.5	78	94%	31.3	8.1–120.7
	Geometric				Geometric				Geometric
DMTP	n	% Detect	Mean (%)	95% CI	n	% Detect	Mean (%)	95% CI	n	% Detect	Mean (%)	95% CI
FW	85	100%	61.1	37.2–100.6	82	100%	73.6	50.6–107.1	78	100%	62.1	35.2–109.8
NFW	85	100%	53.6*	27.7–103.6	88	100%	60.5**	38.2–95.7	78	99%	51.3*	18.4–142.6
	Geometric				Geometric				Geometric
DMDTP	n	% Detect	Mean (%)	95% CI	n	% Detect	Mean (%)	95% CI	n	% Detect	Mean (%)	95% CI
FW	85	100%	7.9	2.3–27.5	82	89%	3.6**	0.3–48.7	78	90%	5.7	1.3–25.8
NFW	85	98%	5.9*	1.6–25.9	88	98%	8.7	2.2–34.2	78	97%	5.6	1.4–22.5

^“**”indicates significant difference at p<0.001 and

^“*”at p<0.05 between FW and NFW, based on Welch twosample t-tests.