TABLE 3.

Multivariate logistic regression analysis of the relationship between dietary metal intake and erectile dysfunction in national health and nutrition examination survey (NHANES) 2001–2004 before propensity score matching (PSM).

Metals	Magnesium		Zinc		Copper		Selenium
	OR* (95% CI)	P	OR* (95% CI)	P	OR* (95% CI)	P	OR* (95% CI)	P
Q1	Ref		Ref		Ref		Ref
Q2	0.930 (0.746–1.161)	0.522	0.901 (0.725–1.121)	0.350	0.977 (0.784–1.217)	0.833	0.942 (0.785–1.170)	0.587
Q3	0.743 (0.592–0.932)	0.010	0.743 (0.593–0.931)	0.010	0.781 (0.622–0.982)	0.034	0.726 (0.582–0.907)	0.005
Q4	0.533 (0.418–0.679)	< 0.001	0.557 (0.439–0.709)	< 0.001	0.535 (0.419–0.683)	< 0.001	0.554 (0.436–0.705)	< 0.001
P for trend	< 0.001		< 0.001		< 0.001		< 0.001

CI, confidence interval; OR, odds ratio; PSM, propensity score matching; *adjust for age, race, education level, marital status, annual household income, BMI, hypertension, diabetes, current health status.