Table 2.

Unadjusted associations between perceived source credibility and covariates (N = 497).

Variable		b	95% CI	P-value
Age		0.02	0.01, 0.03	<0.001
Gender
	Female (ref)
	Male	0.91	0.68, 1.13	<0.001
	Other	−0.25	−0.69, 0.20	0.276
E-cigarette usea
	Never (ref)
	Ever	−0.16	−0.46, 0.14	0.294
	Current	0.70	0.44, 0.96	<0.001
Cigarette smokingb
	Non-smoking (ref)
	Currently smoking	0.89	0.66, 1.12	<0.001
Sexual orientation
	Straight (ref)
	Gay/lesbian	−0.98	−1.33, −0.62	<0.001
	Bisexual	−0.82	−1.07, −0.56	<0.001
	Other	−1.07	−1.55, −0.58	<0.001
Race/ethnicity
	Non-Hispanic White (ref)
	Non-Hispanic Black	0.44	0.07, 0.81	0.02
	Other/multiple	−0.29	−0.75, 0.18	0.228
	Hispanic	−0.46	−0.84, −0.09	0.016
Incomec		0.12	0.09, 0.15	<0.001

^aParticipants were “never” users of e-cigarettes if they reported never using the product, even once; “former” users of e-cigarettes or other tobacco if they reported using the product at least once, but not in the past 30 days; and “current” users of e-cigarettes or other tobacco if they reported using the product at least once in the past 30 days.

^bParticipants were non-smokers if they reported not smoking in the past 30 days and current smokers if they smoked in the past 30 days.

^cIncome was treated as a continuous variable consisting of 11 levels ($0–9,999 to >$100,000 in increments of $10,000).