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. 2015 Jun;105(6):1213-9.
doi: 10.2105/AJPH.2014.302482. Epub 2015 Apr 16.

E-cigarette use in the past and quitting behavior in the future: a population-based study

Wael K Al-Delaimy  1 , Mark G Myers, Eric C Leas, David R Strong, C Richard Hofstetter
Affiliations

E-cigarette use in the past and quitting behavior in the future: a population-based study

Wael K Al-Delaimy et al. Am J Public Health. 2015 Jun.

Erratum in

  • Erratum.
    [No authors listed] [No authors listed] Am J Public Health. 2015 Sep;105(9):e7. doi: 10.2105/AJPH.2014.302482e. Am J Public Health. 2015. PMID: 26252076 Free PMC article. No abstract available.

Abstract

Objectives: We examined whether smokers who used e-cigarettes are more likely to quit after 1 year than smokers who had never used e-cigarettes.

Methods: We surveyed California smokers (n = 1000) at 2 time points 1 year apart. We conducted logistic regression analyses to determine whether history of e-cigarette use at baseline predicted quitting behavior at follow-up, adjusting for demographics and smoking behavior at baseline. We limited analyses to smokers who reported consistent e-cigarette behavior at baseline and follow-up.

Results: Compared with smokers who never used e-cigarettes, smokers who ever used e-cigarettes were significantly less likely to decrease cigarette consumption (odds ratio [OR] = 0.51; 95% confidence interval [CI] = 0.30, 0.87), and significantly less likely to quit for 30 days or more at follow-up (OR = 0.41; 95% CI = 0.18, 0.93). Ever-users of e-cigarettes were more likely to report a quit attempt, although this was not statistically significant (OR = 1.15; 95% CI = 0.67, 1.97).

Conclusions: Smokers who have used e-cigarettes may be at increased risk for not being able to quit smoking. These findings, which need to be confirmed by longer-term cohort studies, have important policy and regulation implications regarding the use of e-cigarettes among smokers.

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Figures

FIGURE 1—
FIGURE 1—
Cigarette quit attempts, decreased cigarette consumption, and abstinence for 1 month or more at follow-up, by use of e-cigarettes: California Smokers Cohort, 2011–2012.
See this image and copyright information in PMC

Comment in

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