Pesticides in house dust from urban and farmworker households in California: an observational measurement study

Table 3 Spearman rank-order correlation coefficients for dust concentrations between the first and second collections for the most frequently detected analytes.^a

Analyte	Salinas farmworker homes (n = 14)^b	Oakland urban homes (n = 12) ^b	All homes (n = 26)^c
	Spearman rho
Organophosphates
Diazinon	0.88**	0.97**	0.92*
Chlorpyrifos	0.83**	--	--
Pyrethroids
cis-permethrin	0.78**	1.00**	0.91**
trans-permethrin	0.70**	1.00**	0.90**
Allethrin	0.49	0.18	0.36
Cypermethrin	0.87**	0.89**	0.89**
Synergist Ingredient
Piperonyl butoxide	0.77*	0.97**	0.89**
Phthalate Herbicide
Chlorthal-dimethyl	0.78*	--	--

a. Only those homes for which we were able to measure analytes in both dust samples were included in these analyses. b. Spearman correlation coefficients are only provided when analyte DF≥50% in respective locations at each collection. c. Correlation coefficients for all homes are provided when analyte DF≥50% in both locations and collections. ** p ≤ 0.0001, * p < 0.01

ISSN: 1476-069X