Di-(2-Ethylhexyl) Phthalate (DEHP) in House Dust in Canadian Homes: Behaviors and Associations with Housing Characteristics and Consumer Products

Table 3

Adjusted associations between DEHP concentration in the dust (μg/g) and housing characteristics from the multivariable linear regression model.

Home characteristics	Effect estimates on log scale (95% CI)	% change of DEHP concentrations compared to the reference group (95% CI)		value (ANOVA)
Quantity of plastic/vinyl furniture				0.03
0-3 pieces^a	0	—	—
4-6 pieces	0.25 (0.08-0.43)	28% (8%-54%)	0.004
7-9 pieces	0.09 (-0.10, 0.28)	9% (-10%-34%)	0.37
More than 10 pieces	0.20 (0.01-0.39)	22% (1%-48%)	0.04
Vinyl flooring in the kitchen or bathroom				0.05 .
No^a	0	—
Bathroom only	0.05 (-0.32-0.42)	5% (-28%-52%)	0.78
Kitchen only	0.07 (-0.31–0.44)	7% (-27%-55%)	0.72
Both kitchen and bathroom	0.56 (0.15-0.97)	75% (16%-164%)	0.007
Mold signs in the home				0.01
No^a	0	—
Yes	0.17 (0.04-0.3)	19% (4%-35%)	0.02

Models adjusted for study center, ambient temperature on the sampling day, and household income. “% change of DEHP concentrations compared to the reference group” is presented to suggest the effect of each factor on DEHP in dust concentrations in a more intuitive way. This is calculated using the formula . ^aThe reference group of each variable. Stars represent statistically significant: : value < 0.05; : value < 0.01; .: value < 0.1. indicates the significance level of each group of the variable compared to the reference group of the variable.