Table 2.
Quitting Behavior and Bivariate Predictors of Adult Stable Smokers Who Used Electronic Cigarette (EC) in Past 30 Days
| All smokers (N = 2,376) | Non-EC users (N = 2,157) | EC users a(N = 219) | Unadjusted | Adjustedb | |||
|---|---|---|---|---|---|---|---|
| Quitting behavior | Mean (SD) or % (N) | Mean (SD) or % (N) | Mean (SD) or % (N) | OR (95% CI) | p value | OR (95% CI) | p value |
| Currently trying to reduce(Ref = No) | 70.7 (1,680) | 70.1 (1,513) | 76.3 (167) | 1.37 (0.99–1.89) | .06 | – | – |
| Intention to quit | |||||||
| Never | 10.9 (259) | 10.8 (234) | 11.4 (25) | Ref | – | ||
| Future | 54.6 (1,298) | 54.8 (1,183) | 52.5 (115) | 0.91 (0.58–1.43) | .68 | – | – |
| Within six months | 26.6 (631) | 26.4 (569) | 28.3 (62) | 1.02 (0.63–1.66) | .94 | – | – |
| Within 30 days | 7.9 (188) | 7.9 (171) | 7.8 (17) | 0.93 (0.49–1.78) | .83 | – | – |
| Duration longest quit attempt in past year (days) | 77.25 (70.91) | 75.07 (69.72) | 91.72 (77.09) | 1.00 (1.00–1.01) | .01 | – | – |
| Quit attempt (24hr) in past year (Ref = No) | 47.4 (1,127) | 45.5 (981) | 66.7 (146) | 2.39 (1.79–3.22) | <.001 | 2.26 (1.62–3.17) | <.001 |
| Number of 24hr quit attempts in past year | 3.15 (8.38) | 2.99 (8.09) | 4.76 (10.69) | 1.02 (1.01–1.03) | .004 | – | – |
| Number of quit methods used | 0.73 (1.19) | 0.66 (1.12) | 1.42 (1.56) | 1.47 (1.34–1.61) | <.001 | .913 (.536–1.56) | .738 |
| Methods used to quit (Ref = No) | |||||||
| Nicotine patch, gum, or lozenge | 25.0 (594) | 23.8 (514) | 36.5 (80) | 1.84 (1.37–2.46) | <.001 | .890 (.462–1.71) | .727 |
| Nicotine inhaler or spray | 3.2 (77) | 2.8 (60) | 7.8 (17) | 2.94 (1.68–5.14) | <.001 | 1.81 (.740–4.42) | .193 |
| Zyban | 7.3 (173) | 6.7 (145) | 12.8 (28) | 2.03 (1.32–3.13) | <.001 | .996 (.453–2.19) | .992 |
| Chantix | 7.3 (174) | 6.9 (148) | 11.9 (26) | 1.83 (1.18–2.85) | .01 | – | – |
| Talk to doctor or nurse | 9.9 (236) | 8.8 (189) | 21.5 (47) | 2.85 (1.99–4.06) | <.001 | 1.30 (.620–2.72) | .489 |
| Talk to counselor | 6.3 (149) | 5.6 (120) | 13.2 (29) | 2.59 (1.68–3.99) | <.001 | 1.23 (.573–2.62) | .600 |
| Attend class or group program | 4.0 (95) | 3.2 (70) | 11.4 (25) | 3.84 (2.38–6.21) | <.001 | 2.46 (1.12–5.42) | .026 |
| Telephone counseling | 3.2 (77) | 2.9 (62) | 6.8 (15) | 2.49 (1.39–4.45) | <.001 | .894 (.346–2.32) | .818 |
| Internet or online program | 4.1 (97) | 3.6 (78) | 8.7 (19) | 2.53 (1.50–4.27) | <.001 | 1.15 (.494–2.68) | .746 |
| Smokeless tobacco (snus) | 2.7 (64) | 1.8 (39) | 11.4 (25) | 6.70 (4.15–11.81) | <.001 | 4.23 (1.80–9.92) | ≤.001 |
| Start using EC | 8.7 (206) | 5.1 (110) | 43.8 (96) | 14.52 (10.46–20.18) | <.001 | 10.75 (7.46–15.47) | <.001 |
| Quit on own | 33.1 (786) | 35.0 (755) | 14.2 (31) | 0.31 (0.21–0.45) | <.001 | .548 (.344–.875) | .012 |
Note. aAny past 30 day use.
bAdjusted model includes significant bivariate associations adjusted for multiple comparisons (p ≤ .001).