Table 3.

Associations between Exposure to Social Media Advertising/Promotion and e-Cigarette Use

		E-cig ever use		E-cig current use
		OR (SE)		OR (SE)
(a) Ever see e-cig advert in social media		N=1230
	No	Ref		Ref
	Yes	2.91**	(0.76)	2.82**	(1.01)
(b) How often seeing advert (frequency)		N=1230
	Never	Ref		Ref
	Few a year	2.16**	(0.78)	2.05	(1.24)
	Few a month	3.41**	(1.13)	4.13**	(2.27)
	Few a week or almost daily	6.79**	(2.24)	13.82**	(7.47)
(c) Duration of advert		N=1145
	1 minute or less	Ref		Ref
	1-5 minutes	1.13	(0.19)	1.29	(0.28)
	5+ minutes	1.84**	(0.43)	2.69**	(0.70)
(d) Advertiser: Regular people		N=1230
	No	Ref		Ref
	Yes	0.97	(0.15)	0.60**	(0.12)
(e) Advertiser: Celebrity/influencer		N=1230
	No	Ref		Ref
	Yes	2.30**	(0.37)	2.32**	(0.47)
(f) Advertiser: Seller		N=1230
	No	Ref		Ref
	Yes	1.69**	(0.26)	1.69**	(0.32)
(g) Advertiser: Public figure/politician		N=1230
	No	Ref		Ref
	Yes	2.42**	(0.67)	1.90**	(0.60)

N, sample; Ref, Reference; OR, Odds Ratio; SE, Standard Error; Values are from logit regression of the outcome variables (i.e. e-cigarette ever use and current use) on advertising exposure, controlling for age, sex, education, income, occupation, and smoking status. Analyses were conducted in STATA 15.