. Author manuscript; available in PMC: 2011 May 1.

Published in final edited form as: J Expo Sci Environ Epidemiol. 2009 Nov 4;20(6):559–569. doi: 10.1038/jes.2009.54

Table 6.

Multivariate regression results for algorithm score factors from an interviewer-administered questionnaire and urinary 2,4-D concentrations

	Not Including Pre-Application Urine Concentration		Including Pre-Application Urine Concentration
Dependent Variable	lnPSTCONC		lnPSTCONC
Overall Model Results
N^a	67		66
F-Value	4.85		18.1
r²	0.24		0.60
p	0.0018		<0.0001
Independent Variables^b	PE^c	p	PE	p
Intercept	0.68	0.421	0.34	0.579
MIX Score (0 or 9)	0.39	0.553	−0.09	0.850
APPLY Score (3 or 9)	0.20	0.536	0.45	0.067
REPAIR Score (0 or 2)	0.29	0.363	0.41	0.085
PPE Score (0.3–1.0)	2.78	0.0001	2.06	0.0001
lnPRECONC	-	-	0.56	<0.0001

The N values are lower than 69 due to one or more missing variable values.

For Mix, Apply, and Repair variables the lower score is the reference value.

Parameter estimate