Characteristics of participants (N=31)
| Characteristic | N (%) |
|---|---|
| Gender | |
| Male | 18 (58%) |
| Female | 13 (42%) |
| Age (in years) | 33.6±10.9 |
| Race | |
| White | 26 (84%) |
| Black | 5 (16%) |
| Education (in years) | 14.2±1.9 |
| E-cigarette use status | |
| Dual user | 12 (38.7%) |
| Sole user | 19 (61.3%) |
| Dual user | |
| Non-menthol cigarette user | 7 (58.3%) |
| Menthol cigarette user | 5 (41.6%) |
| Length of combustible cigarette smoking (in years)* | 18.1±12.6 |
| Length of e-cigarette use (in months) | |
| Dual user* | 26±14 |
| Sole user* | 20±11 |
| Nicotine strength (mg/mL) | |
| Dual user* | 20.6±5.7 |
| Sole user† | 17.2±6.5 |
| Favourite e-cigarette flavour category‡ | |
| Fruit (eg, berries, peach, cherry, watermelon) | 13 (42.0%) |
| Tobacco | 6 (19.4%) |
| Vanilla | 6 (19.4%) |
| Menthol | 3 (9.6%) |
| Other (black magic, bubble gum, capp and absinthe) | 3 (9.6%) |
| Penn State Electronic Cigarette Dependence Index | |
| High dependence | 6 (19.4%) |
| Medium dependence | 14 (45.2%) |
| Low dependence | 5 (16.1%) |
| Not dependent | 6 (19.4%) |
*Response from one respondent was missing.
†Responses from two respondents were missing.
‡Flavours are categorised based on participants’ open-ended responses.