Table 2.

Airborne metal concentrations (ng/m³), odds ratios (OR) and 95% confidence intervals (CIs) for the relationship between residential airborne heavy metals quintiles and ER/PR-negative tumor receptor status (n= 672)

		Ql	Q2	Q3	Q4	Q5	P-trend
Antimony	Conc. (ng/m3)	<0.02	0.02–0.03	0.03–0.04	0.04–0.06	0.06+
	OR (95% CI)	Ref.	1.3 (0.7, 2.5)	1.7 (0.8, 3.3)	2.1 (1.1, 4.1)	1.8 (0.9, 3.7)	0.05
Arsenic	Cone. (ng/m3)	<0.82	0.83–0.96	0.97–1.19	1.20–1.74	1.75+
	OR (95% CI)	Ref.	0.9 (0.5, 1.7)	0.8 (0.4, 1.5)	1.3 (0.7, 2.5)	0.8 (0.5, 1.5)	0.89
Beryllium	Conc. (ng/m3)	<0.05	0.05–0.06	0.06–0.06	0.06–0.09	0.09+
	OR (95% CI)	Ref.	0.5 (0.3, 0.9)	0.5 (0.3, 1.0)	0.8 (0.4, 1.5)	0.7 (0.3, 1.5)	0.53
Cadmium	Conc. (ng/m3)	<0.23	0.23–0.32	0.33–0.54	0.54–0.90	0.91+
	OR (95% CI)	Ref.	1.5 (0.8, 2.9)	1.5 (0.8, 2.9)	1.1 (0.5, 2.2)	2.3 (1.2, 4.4)	0.04
Chromium	Conc. (ng/m3)	<0.65	0.66–0.72	0.73–0.89	0.90–1.64	1.65+
	OR (95% CI)	Ref.	1.1 (0.6, 2.1)	1.3 (0.7, 2.4)	1.2 (0.7, 2.3)	1.0 (0.5, 2.1)	0.83
Cobalt	Conc. (ng/m3)	< 0.010	0.010–0.014	0.014–0.017	0.017–0.024	0.024+
	OR (95% CI)	Ref.	1.4 (0.7, 2.8)	2.2 (1.2, 4.2)	1.8 (0.9, 3.4)	2.0 (0.9, 4.4)	0.04
Lead	Conc. (ng/m3)	<4.0	4.1–4.4	4.4–4.7	4.7–5.3	5.3+
	OR (95% CI)	Ref.	1.4 (0.7, 2.8)	1.9 (0.9, 3.9)	1.4 (0.7, 2.9)	1.4 (0.7, 2.9)	0.16
Manganese	Conc. (ng/m3)	<2.4	2.5–3.2	3.2–3.8	3.8–4.8	4.8+
	OR (95% CI)	Ref.	2.8 (1.3, 5.8)	2.7 (1.3, 5.9)	3.4 (1.5, 7.7)	2.1 (0.9, 4.8)	0.13
Mercury	Conc. (ng/m3)	0.068	0.069–0.077	0.077–0.084	0.085–0.103	0.104+
	OR (95% CI)	Ref.	1.0 (0.5, 2.0)	1.0 (0.5, 1.9)	1.9 (1.0, 3.5)	1.0 (0.5, 2.1)	0.23
Nickel	Conc. (ng/m3)	<0.93	0.94–1.08	1.08–1.19	1.20–1.46	1.47+
	OR (95% CI)	Ref.	1.0 (0.5, 2.0)	0.8 (0.4, 1.6)	0.9 (0.4, 1.8)	1.7 (0.8, 3.4)	0.26
Selenium	Conc. (ng/m3)	<0.09	0.09–0.11	0.11–0.16	0.16–0.20	0.20+
	OR (95% CI)	Ref.	1.2 (0.6,2.2)	1.1 (0.6, 2.0)	1.9 (1.0, 3.6)	1.1 (0.6, 2.0)	0.35

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