Table 3.

Odds ratios (OR) and 95% confidence intervals (CIs) for the relationship between residential airborne heavy metals mixture quintiles and ER/PR-negative tumor receptor status (n= 672)

	Q1	Q2	Q3	Q4	Q5	P-trend
Mixture 1	Ref.	2.0(1.0,4.0)	1.5(0.8,3.1)	2.0(1.0,4.1)	2.3(1.1,4.8)	0.06
Mixture 2	Ref.	1.2(0.6,2.4)	1.9(0.9,3.7)	1.2(0.6,2.5)	1.7(0.9,3.3)	0.19
Mixture 3	Ref.	0.9(0.5,1.6)	0.8(0.4,1.5)	1.0(0.5, 1.8)	1.3(0.7,2.3)	0.42
Mixture 4	Ref.	1.1(0.6,2.1)	1.0(0.5,2.0)	0.7(0.4, 1.4)	1.1 (0.6,2.2)	0.85

Models adjusted for age, race/ethnicity, education, BMI, income, census tract affluence and disadvantage, and reproductive factors.