Table 3.

Sensitivity analyses before propensity score matching

Variable	Model 1		Model 2		Model 3		Model 4
	OR (95% CI)	P	OR (95% CI)	P	OR (95% CI)	P	OR (95% CI)	P
Dietary niacin	0.97 (0.96–0.98)	<0.0001	0.98 (0.96–0.99)	<0.001	0.98 (0.97–0.99)	0.01	0.98 (0.97–0.99)	0.02
Stratified by dietary niacin tertiles
Tertile 1	1		1		1		1
Tertile 2	0.63 (0.46–0.86)	0.01	0.65 (0.46–0.93)	0.02	0.68 (0.48–0.95)	0.03	0.66 (0.44–0.98)	0.04
Tertile 3	0.43 (0.32–0.59)	<0.0001	0.53 (0.37–0.76)	0.001	0.61 (0.42–0.87)	0.01	0.57 (0.37–0.89)	0.02
P for trend		<0.0001		<0.001		0.003		0.008

Sensitivity analyses excluded participants taking medications that could affect erectile function. Model 1: unadjusted; Model 2: adjusted for age and race; Model 3: adjusted for age, race, marital status, education level, PIR, BMI categories, recreational activity, smoking status, drinking status, and total daily energy intake; Model 4: additionally adjusted for CVD, hypercholesterolemia, hypertension, diabetes, as well as testosterone levels. OR: odd ratio; CI: confidence interval; BMI: body mass index; PIR: poverty-to-income ratio; CVD: cardiovascular disease