Abstract
AIMS: To use a unique longitudinal data set to assess the association between e-cigarette use while smoking with smoking cessation attempts, cessation and substantial reduction, taking into account frequency of use and key potential confounders.
DESIGN: Web-based survey, baseline November/December 2012, 1-year follow-up in December 2013.
SETTING: Great Britain.
PARTICIPANTS: National general population sample of 4064 adult smokers, with 1759 (43%) followed-up.
MEASUREMENTS: Main outcome measures were cessation attempt, cessation and substantial reduction (≥50% from baseline to follow-up) of cigarettes per day (CPD). In logistic regression models, cessation attempt in the last year (analysis n = 1473) and smoking status (n = 1656) at follow-up were regressed on to baseline e-cigarette use (none, non-daily, daily) while adjusting for baseline socio-demographics, dependence and nicotine replacement (NRT) use. Substantial reduction (n = 1042) was regressed on to follow-up e-cigarette use while adjusting for baseline socio-demographics and dependence and follow-up NRT use.
FINDINGS: Compared with non-use, daily e-cigarette use at baseline was associated with increased cessation attempts [odds ratio (OR) = 2.11, 95% confidence interval (CI) = 1.24-3.58, P = 0.006], but not with cessation at follow-up (OR = 0.62, 95% CI = 0.28-1.37, P = 0.24). Non-daily use was not associated with cessation attempts or cessation. Daily e-cigarette use at follow-up was associated with increased odds of substantial reduction (OR = 2.49, 95% CI = 1.14-5.45, P = 0.02), non-daily use was not.
CONCLUSIONS: Daily use of e-cigarettes while smoking appears to be associated with subsequent increases in rates of attempting to stop smoking and reducing smoking, but not with smoking cessation. Non-daily use of e-cigarettes while smoking does not appear to be associated with cessation attempts, cessation or reduced smoking.
Original language | English |
---|---|
Pages (from-to) | 1160-1168 |
Number of pages | 9 |
Journal | Addiction |
Volume | 110 |
Issue number | 7 |
Early online date | 23 Apr 2015 |
DOIs | |
Publication status | Published - 1 Jul 2015 |
Keywords
- Electronic cigarettes
- Electronic nicotine delivery systems
- Harm reduction
- Quit attempts
- Smoking cessation
- Tobacco