Table 2.

E-cigarette Users: Baseline Predictors of Using a Cigalike Versus Tank E-cigarette at Follow-up (N = 587)^a

Variable			Bivariate				Multivariable
	N	% using tank	OR b	LCI	UCI	P	OR	LCI	UCI	P
Gender
Male	309	22.33	1.00	1.00	1.00	ref	1.00	1.00	1.00	ref
Female	278	25.18	1.17	0.80	1.71	.4176	1.12	0.75	1.67	.5744
Age
18–24	56	14.29	1.00	1.00	1.00	ref	1.00	1.00	1.00	ref
25–39	183	19.67	1.47	0.64	3.38	.3649	1.77	0.75	4.16	.1900
40–54	188	27.66	2.29	1.02	5.18	.0455	2.41	1.05	5.52	.0378
≥55	160	26.88	2.21	0.97	5.04	.0606	2.16	0.92	5.08	.0774
Education
Low	187	33.69	1.00	1.00	1.00	ref	1.00	1.00	1.00	ref
Moderate	233	22.32	0.57	0.37	0.87	.0098	0.57	0.37	0.88	.0118
High	167	14.37	0.33	0.20	0.56	<.0001	0.36	0.21	0.63	.0003
Income
Low	330	25.15	1.00	1.00	1.00	ref	1.00	1.00	1.00	ref
Moderate	144	24.31	0.96	0.61	1.51	.8447	1.24	0.76	2.01	.3849
High	72	15.28	0.54	0.27	1.07	.0764	0.83	0.40	1.72	.6160
No answer	41	24.39	0.96	0.45	2.04	.9155	0.93	0.43	2.02	.8496
Strength of urges to smokec
0—no urge	21	28.57	1.08	0.90	1.30	.4192	1.05	0.87	1.28	.602
1	61	26.23
2	267	22.10
3	172	21.51
4	45	24.44
5—strong urges	21	47.62
Motivation to stop smoking
No motivation to stop in next 3 months	427	25.53	1.00	1.00	1.00	ref	1.00	1.00	1.00	ref
Motivation to stop in next 3 months	160	18.75	0.67	0.43	1.06	.0868	0.75	0.47	1.21	.2343
Any e-cigarette use
No e-cigarette use	328	25.61	1.00	1.00	1.00	ref	1.00	1.00	1.00	ref
E-cigarette use	259	21.24	0.78	0.53	1.15	.2163	0.81	0.54	1.22	.3052

LCI = lower 95% confidence interval; UCI = upper 95% confidence interval.

^aBold indicates significant at P < .05.

^b OR = odds ratio.

^cContinuous variable.