Is the Use of Electronic Cigarettes While Smoking Associated With Smoking Cessation Attempts, Cessation and Reduced Cigarette Consumption? A Survey With a 1-year Follow-Up

Addiction. 2015 Jul;110(7):1160-8. doi: 10.1111/add.12917. Epub 2015 Apr 23.

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.

Keywords: Electronic cigarettes; electronic nicotine delivery systems; harm reduction; quit attempts; smoking cessation; tobacco.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Electronic Nicotine Delivery Systems / statistics & numerical data*
  • Female
  • Follow-Up Studies
  • Humans
  • Logistic Models
  • Longitudinal Studies
  • Male
  • Middle Aged
  • Odds Ratio
  • Smoking / epidemiology*
  • Smoking Cessation / methods
  • Smoking Cessation / statistics & numerical data*
  • Surveys and Questionnaires
  • United Kingdom / epidemiology