Table 4.

Logistic regression (GEE) model of the variable sum of dimethyl-substituted metabolites (DMAP) below vs. above the limit of detection in the urine of schoolchildren in Talca Province Chile in December 2010 (summer) and May 2011 (fall).

DMAP*	Coef.	Std. Error	Odds Ratio	[95% Conf. Interval]		p-value
Phosmet (a)	4.12	0.59	60.61	19.19	191.37	<0.0001
Distance from farms (b)	0.9	0.29	2.48	1.38	4.45	0.002
Pesticide at home(c)	1.44	0.48	3.48	1.37	8.85	0.009
Empedrado (d)	0.87	0.42	2.37	1.04	5.39	0.04
Talca (d)	−0.38	0.37	0.66	0.31	1.36	0.26
San Clemente (d)	−0.45	0.41	0.64	0.29	1.41	0.27
Time (e)	−2.16	0.43	0.12	0.05	0.27	<0.0001
Constant	0.74	0.59

n of observations=369; n of groups=190

^**Sum of Dimethyl-substituted metabolites (DMAP) in the urine of schoolchildren dichotomized as below vs. above the Limit of Detection.

^(a)Variable related with exposure/not exposure to eating of vegetables/fruits with phosmet residues,

^(b)Distance of housing to farms that apply pesticides (Less or equal to 500m).

^(c)Use of OP pesticide fenitrothion at home.

^(d)County (reference=Maule).

^(e)Summer =1 (December 2010) or fall=0 (May 2011)