Table 1.
Demographic Characteristics by Group
| ECIG-experienced N = 33 |
ECIG-naïve N = 31 |
|||||
|---|---|---|---|---|---|---|
| Mean or N | SD | Mean or N | SD | t-statistic | p value | |
| Number Women | 6 | 13 | −2.1a | <.05 | ||
| Caucasian | 24 | 16 | −1.8a | n.s. | ||
| Age (years) | 30.3 | 8.4 | 30.8 | 9.9 | −0.3a | n.s. |
| Screen CO | 3.0 | 2.1 | 19.9 | 5.6 | −16.2a | <.05 |
| Cigarettes per day | 0.2 | 0.8 | 16.5 | 9.4 | −10.0a | <.05 |
| Volume liquid used/ day (ml) | 3.3 | 3.7 | N/A | N/A | N/A | N/A |
| Liquid concentration (mg/ml) | 17.5 | 5.4 | N/A | N/A | N/A | N/A |
| Months ECIG/cigarette use | 17.1 | 9.9 | 110.3 | 113.9 | N/A | N/A |
| FTNDc | 4.3 | 2.0 | 4.7 | 1.9 | −0.8a | n.s. |
| Penn State Dependence Indexd | 9.9 | 3.4 | 12.2 | 4.0 | −2.0b | <.05 |
| Session Flavor Menthol | 12 | 19 | −2.0a | n.s. | ||
Note: n.s. = not significant; N/A = not applicable.
a
df = 62
b
df = 57
c
The Fagerström Test for Nicotine Dependence (Heatherton et al., 1991) was modified such that the word “e-cigarette” appeared for ECIG-experienced individuals.
d
Penn State Dependence Index (Foulds et al., 2015); Electronic Cigarette Dependence Index was administered to ECIG-experienced individuals and the Cigarette Dependence Index was administered to ECIG-naïve cigarette smokers.