Table 3.
Smoking and vaping characteristics of the full sample, and broken down by current smokers (dual users) and former smokers.
| Variable | Full sample (N=128) | Current smokers (N=52) | Former smokers (N=76) | p |
|---|---|---|---|---|
| Mean cigarettes per day on days smoked (SD)1 | 13.33 (11.31) | 8.02 (8.57) | 16.96 (11.56) | <.001 |
| Mean days cigarettes smoked per week (SD)1 | 6.01 (1.93) | 5.01 (2.35) | 6.70 (1.15) | <.001 |
| Mean number of daily e-cigarette uses (SD) | 36.50 (53.36) | 26.66 (42.40) | 43.91 (59.60) | n.s |
| % reporting vaping continuously all day (SD) | 47% | 35% | 66% | .001 |
| Personal device used2: | ||||
| Disposable, “cig-a-like” | 11% | 14% | 5% | n.s |
| Refillable tank system | 9% | 14% | 11% | n.s |
| Tank system with modifiable electric components | 66% | 52% | 75% | n.s |
| Mean nicotine content of solution in personal device (mg/ml) | 8.80 (7.51) | 10.57 (8.07) | 7.71 (6.98) | .046 |
| Flavor used most often: | ||||
| Tobacco | 11% | 17% | 7% | n.s |
| Menthol | 21% | 21% | 21% | |
| Fruit | 41% | 40% | 42% | n.s |
| Other (e.g. custard, dessert, beverages) | 23% | 12% | 30% | .013 |
| Reported e-cigarette initiation to quit smoking | 68% | 50% | 80% | <.001 |
| Flavor requested for ad-lib session: | ||||
| Tobacco | 12% | 17% | 8% | n.s |
| Menthol | 25% | 25% | 25% | n.s |
| Fruit | 63% | 58% | 67% | n.s |
| Mean EDCI | 10.05 (4.66) | 8.44 (5.10) | 11.15 (4.00) | .001 |
| Mean FTND1 | 4.50 (2.89) | 3.69 (3.28) | 5.05 (2.45) | .008 |
Notes:
1
Among former smokers, cigarette quantity, frequency, and dependence reflect reported levels prior to quitting smoking.
2
Personal device used was coded from participants’ self-reported device brand/model.
Above p values represent significant differences between current and former smokers. n.s = not significant. No significant differences were found between conditions on these variables. ECDI = Penn State Electronic Cigarette Dependence Inventory. FTND = Fagerström Test for Nicotine Dependence.