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. Author manuscript; available in PMC: 2021 Apr 1.
Published in final edited form as: Drug Alcohol Depend. 2020 Feb 5;209:107886. doi: 10.1016/j.drugalcdep.2020.107886

Table 1.

Sample demographics and ECIG/tobacco use characteristics.

Characteristic N %
Age (M, SD) 33.2, 9.9
Sex
  Female 37 52.9
  Male 31 44.3
  Transgender or other 2 2.8
Ethnicity
  Hispanic/Latino(a) 12 17.1
Race
  American Indian/Alaskan Native 1 1.4
  Asian 2 2.9
  Native Hawaiian/Pacific Islander 1 1.4
  Black/African American 3 4.3
  White/European American 59 84.3
  More than one race 4 5.7
Education
  High School diploma or GED 12 17.2
  Some college credit, but less than 1 year 8 11.4
  1 or more years of college, no degree 14 20.0
  Associate’s degree 8 11.4
  Bachelor’s degree 20 28.6
  Higher than a bachelor’s degree 8 11.4
Regular ECIG use history1
  0-3 months 5 7.3
  4-6 months 6 8.7
  7-12 months 9 13.0
  Between 1-2 years 25 36.2
  More than 2 years 24 34.8
ECIG frequency
  At least once per day 10 14.3
  Every once in a while throughout the day 9 12.9
  Fairly frequently throughout the day 32 45.7
  Almost always throughout most of the day 19 27.1
Regular ECIG device
  Prefilled disposable/Cig-alike 7 10.0
  E-hookah 2 2.9
  Vape pen/eGo style device 9 12.9
  Rebuildable/Mechanical Mod or Box Mod 19 27.1
  E-cigar 2 2.9
  Pod mod such as JUUL 31 44.3
ECIG liquid nicotine concentration2
  1-4 mg/ml 18 25.7
  5-10 mg/ml 20 28.6
  11-20 mg/ml 20 28.6
  20+ mg/ml 10 14.3
  Don’t know 2 2.9
ECIG liquid flavor preference
  Menthol or mint 19 27.1
  Tobacco 16 22.9
  Fruit 23 32.9
  Other (including clove, spice, nut, alcoholic drink, coffee/tea, candy, or dessert) 8 11.4
  I usually use multiple flavors 4 5.7
ECIG use after waking
  After 60 minutes 14 20.0
  31-60 minutes 15 21.4
  6-30 minutes 22 31.4
  Within 5 minutes 19 27.1
E-Cigarette Dependence Scale - Reach for ECIG3
  Never 1 1.4
  Rarely 2 2.9
  Sometimes 23 32.9
  Often 30 42.9
  Almost always 14 20.0
E-Cigarette Dependence Scale – Vape more before not allowed3
  Rarely 4 5.7
  Sometimes 18 25.7
  Often 27 38.6
  Almost always 21 30.0
E-Cigarette Dependence Scale - Drop everything to buy ECIGs3
  Never 4 5.7
  Rarely 14 20.0
  Sometimes 29 41.4
  Often 12 17.1
  Almost always 11 15.7
E-Cigarette Dependence Scale - Craving gets intolerable3
  Never 4 5.7
  Rarely 14 20.0
  Sometimes 29 17.1
  Often 12 17.1
  Almost always 11 15.7
Lifetime use of 100+ cigarettes
  Yes 59 84.3
Current use of other tobacco products
  Cigarettes 40 57.1
  Cigar 14 20.0
  Cigarillo or little cigar 15 22.0
  Smokeless 3 4.3
  Waterpipe 11 15.7

Note. Total n and percentages for sample characteristics is based on the 70 participants who completed the participant questions. Five participants completed brainstorming but did not complete the participant questions.

1

Regular use was defined as using an ECIG some days or most days.

2

Response options for liquid nicotine concentration ranged from 0 to 36 mg/ml. Some pod mods, such as Juul, contain liquids that have concentrations higher than 36 mg/ml.

3

Items from the 4-item E-Cigarette Dependence Scale (Morean et al., 2018) including “I find myself reaching for my e-cigarette without thinking about it,” “I drop everything to go out and buy e-cigarettes or e-juice,” I vape more before going into a situation where vaping is not allowed,” and “When I haven’t been able to vape for a few hours, the craving gets intolerable.”