Exposure to e-cigarette advertising, attitudes, and use susceptibility in adolescents who had never used e-cigarettes or cigarettes

Table 3 Odds ratios of susceptibility to EC use by attitudes towards ECs and the tobacco industry

	Being susceptible to use ECs
	Crude OR	Adjusted OR
	(95% CI)^a	(95% CI)^b
a. Attitudes towards ECs
EC use harms health
Certain	1	1
Uncertain	2.40 (2.00, 2.90)^***	1.57 (1.28, 1.93)^***
Tolerant attitudes towards EC use
No	1	1
Yes	4.17 (3.45, 5.04)^***	3.30 (2.68, 4.06)^***
b. Attitudes towards the tobacco industry
The tobacco industry is respectable
No	1	1
Yes	2.13 (1.77, 2.58)^***	1.70 (1.39, 2.07)^***
Tobacco companies make youth smoke
No	1	1
Yes	0.87 (0.72, 1.05)	1.01 (0.83, 1.23)

***P < 0.001
^aCI = confidence interval. OR = odds ratio
^bAdjusted for sex, grade, perceived family affluence, parental cigarette/EC use, other attitudinal variables in the table, and school clustering effects

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