Table 2.

Characteristics of Past 30-Day Electronic Cigarette (E-cigarette) Users Who Usually Used JUUL Versus Another/Unknown/No Usual Brand, International Tobacco Control Policy Evaluation Project (ITC) Youth Tobacco and E-cigarette Survey, US, 2017 (n = 444)

	Weighted %		Model estimates1
	JUUL users (weighted n = 43)	Other (weighted n = 401)	aOR [95% CI]
Socio-demographic characteristics2
Sex			Χ2=0.9 (p = .34)
Male	60.4	59.9
Female	39.6	40.1
Age			Χ2=14.5 (p < .001)
16	0	16.8	b = 0.917
17	7.8	17.5	aOR = 2.50 [1.56 to 4.01]
18	39.4	34.3
19	52.9	31.4
Race/ethnicity			Χ2 = 7.1 (p = .07)
White, non-Hispanic	72.1	74.4
Black or African American	4.2	13.5
White, Hispanic	9.1	4.6
Other	14.7	7.5
Student status			Χ2 = 2.1 (p = .15)
Current/returning student	90.6	79.3
Not current/returning student	9.4	20.7
Computers in household			Χ2 = 13.3 (p < .001)
None	2.6	0.2	b = 0.437
One	0	15.4	aOR = 1.55 [1.22 to 1.96]
Two	11.5	26.3
Three	18.5	24.3
Four	19.5	15.5
Five	16.6	8.0
More than five	26.5	9.7
Don’t know/Refused	4.9	0.5
Smoking-/E-cigarette-related
Smoking status3			Χ2 = 2.9 (p = .40)
Never smoker	14.1	10.3
Experimental smoker	40.6	47.6
Current smoker	45.3	37.4
Former smoker	0	4.8
Lifetime use of e-cigarettes			Χ2 = 2.7 (p = .75)
1 d	3.0	7.6
2–10 d	15.9	19.2
11–20 d	9.1	16.0
21–50 d	17.7	17.1
51–99 d	11.8	12.0
100 d or more	42.5	28.1
Frequency of e-cigarette use in past 30 days - # of days, mean (SD)			Χ2 = 0.2 (p = .64)
Plans to quit e-cigarettes	13.4 (10.7)	10.1 (9.6)	Χ2 = 5.7 (p = .23)
Within the next 6 months	10.2	21.8
In the future, beyond 6 months	26.2	18.1
Not planning to quit	37.4	35.8
Do not currently use	7.3	9.6
Don’t know	18.9	14.8
Ever tried to quit e-cigarettes			Χ2 = 4.9 (p = .03)
No	59.4	75.4	Ref.
Yes	40.6	24.6	aOR = 2.65 [1.12 to 6.30]
Urges to use e-cigarettes4			Χ2 = 2.3 (p = .68)
Never	36.0	27.3
Less than once a week	7.0	14.7
At least once a week	20.2	20.9
Every day or most days	15.6	17.6
Several times a day	21.1	17.4
Don’t know/Refused	0	2.0
Addicted to e-cigarettes5			Χ2 = 5.9 (p = .12)
Not at all	55.8	60.8
Yes, a little addicted	27.5	26.0
Yes, very addicted	11.6	11.0
Don’t know/Refused	5.2	2.2

aOR = adjusted odds ratio; CI = confidence interval.

¹All estimates are weighted, from logistic regressions models adjusting for age, sex, race/ethnicity, student status, and number of computers in household. Wald Χ² statistics reported for overall test of significance in model. Boldface denotes significance (p < .05) in the model.

²Sociodemographic characteristics were tested together in the base model, to which all other variables were later added (one by one).

³Never smokers said “No” to “Have you ever tried cigarette smoking, even one or two puffs?”; experimental smokers said “Yes” to ever cigarette smoking, but had smoked less than 100 cigarettes in their life (in response to “How many cigarettes have you smoked in your entire life?”); current smokers had smoked at least 100 cigarettes in their life (selected “100 or more cigarettes” to lifetime use) and smoked in the past 30 days (in response to “When was the last time you smoked a cigarette, even one or two puffs?”); former smokers had smoked at least 100 cigarettes in their life, but did not smoke in the past 30 days

⁴Responses to the question, “In the past 30 days, how often did you have a strong urge to use an e-cigarette/vape?” “Don’t know/Refused” responses excluded from the model.

⁵Responses to the question, “Do you consider yourself addicted to using e-cigarettes/vaping?”