Table 1.

Participant demographics and tobacco use characteristics (N = 55).

Characteristic	N	%
Age (M, SD)	(20.4, 2.1)
Gender
Female	35	63.6%
Male	20	36.4%
Ethnicity
Not Hispanic / Latino	49	89%
Race
Asian	9	16.4%
Black/African American	6	10.9%
White / Caucasian	32	58.2%
More than one race	7	12.7%
Unknown	1	1.8%
E-Cigarette use Past 30 Days
None	14	25.5%
1-5 days	9	16.3%
6-10 days	6	10.9%
11-20 days	6	10.9%
21-29 days	10	18.2%
All 30 days	10	18.2%
E-Cigarette Type (current or former)a
Disposable cig-alike device (e.g., Blu, Vuse)	3	5.5%
Pod-style device (e.g., Juul)	36	65.5%
Rechargeable cartridge-based device	2	3.6%
Tank system/Mod	14	25.4%
E-Cigarette Nicotine Concentration (current or former)a
My liquid did not contain nicotine	2	3.6%
1-5 mg/ml	22	40.0%
6-10 mg/ml	5	9.1%
11-20 mg/ml	2	3.6%
20-30 mg/ml	3	5.5%
Over 30 mg/ml	8	14.6%
I don’t know	13	23.6%
Primary Reason for Using E-Cigarettes
Curiosity/just wanted to try them	10	18.2%
They come in flavors I like	0	0.0%
I like smoke tricks/clouds	4	7.3%
To relax/relieve stress	14	25.5%
To get a buzz	12	21.8%
I could use them anywhere	2	3.6%
They don’t smell bad	0	0.0%
They are cool	1	1.8%
My friends use them	8	14.6%
My parents/family use them	0	0.0%
They are healthier than cigarettes	3	5.5%
Other	1	1.8%
Cigarette Smoking Past 30 Days
None	2	3.6%
1-5 days	18	32.7%
6-10 days	6	10.9%
11-20 days	17	30.9%
21-29 days	9	16.4%
All 30 days	3	5.5%
Number Cigarettes Per Day
1-5	49	89.1%
5-10	3	5.5%
10-15	2	3.6%
15-20	1	1.8%
More than 20	0	0.0%

^aIndicates participants’ preferred or most commonly used e-cigarette device and liquid nicotine concentration.