Table 1.
Demographic, Tobacco Use, and Electronic Cigarette Use Characteristics of the Sample
| Characteristic | N = 3,609 |
|---|---|
| Male, % (n) | 72.2 (2,604) |
| Mean age (SD) | 40.5 (12.6) |
| White, % (n) | 92.0 (3,319) |
| With college degree, % (n) | 40.7 (1,467) |
| Live in United States, % (n) | 84.8 (3,062) |
| Mean number of lifetime cigarette quit attempts (SD) | 8.6 (15.5) |
| Mean number of months since quitting smoking (SD) (n = 3,281) | 12.7 (12.2) |
| Mean length of e-cig use in months (SD) | 13.4 (12.9) |
| Mean E-liquid nicotine concentration, mg/ml (SD) | 15.5 (8.6) |
| Mean number of E-cigs used before current model (n = 3,601) | 4.2 (4.1) |
| Use e-cig liquid >12mg/ml, % (n) | 50.8 (1,834) |
| Who started using E-cigs with intention to quit smoking, % (n) | 74.4 (2,684) |
| Who quit smoking cigarettes prior to using E-cig, % (n) | 8.8 (317) |
| Who plan to continue using e-cig for at least another year, % (n) | 78.8 (2,845) |
| E-cig larger than regular cigarette, % (n) | 87.1 (3,145) |
| E-cig cost > $50 (n = 3,583), % (n) | 55.7 (1,994) |
| E-cig purchased at gas (petroleum) station, % (n) | 9.2 (331) |
| Use only Vegetable Glycerin E-liquid, % (n) | 8.8 (234) |
| E-cig with button to press prior to inhalation, % (n) | 84.7 (3,056) |
| E-cig with button to control battery voltage, % (n) | 61.9 (2,234) |
| E-cig uses single 3.7-V battery, % (n) | 72.7 (2,622) |
| E-cig requires more than 1 battery, % (n) | 4.9 (175) |
| E-cig uses proprietary battery, % (n) | 30.3 (1,095) |
| Switched to current brand because it gives a more satisfying “hit,” % (n) | 74.8 (2,699) |