Table 2:

Logistic regression models of adolescent lifetime e-cigarette use (N=903)

Independent variable	Level	Model 1 unadjusted			Model 2 adjusted
		OR	95% CI	p	AOR	95% CI	p
School grade	7	-			-
	9	0.82	(0.49, 1.4)	0.47	1.1	(0.64, 2.0)	0.68
	11	2.5	(1.5, 4.2)	<0.001	2.3	(1.3, 4.0)	<0.01
Sex	Female	-
	Male	0.94	(0.61, 1.5)	0.79	0.86	(0.55, 1.4)	0.53
Susceptibility/curious	Definitely not	-
	Other	11.8	(5.6, 24.7)	<0.001	10.6	(4.9, 22.9)	<0.001
Susceptibility/next 12 months	Definitely not	-
	Other	2.8	(1.7, 4.7)	<0.001	2.4	(1.4, 4.1)	<0.01
Susceptibility/best friends	Definitely not	-
	Other	2.4	(1.3, 4.4)	<0.01	2.6	(1.34, 5.0)	<0.01
Perceived addiction risk	Not/a little	-
	Moderate/very	0.69	(0.42, 1.1)	0.14	0.88	(0.52, 1.5)	0.64
Perceived harm risk	Not/a little	-
	Moderate/very	0.44	(0.26, 0.75)	<0.01	0.39	(0.23, 0.67)	<0.001

Note: OR = Odds ratio; 95% CI = 95% Confidence interval; AOR = Adjusted odds ratio. Model 2 controls for lifetime cigarette use.