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NAQC Newsroom: Research

E-Cigarette Use in the Past and Quitting Behavior in the Future: A Population-Based Study.

Thursday, May 14, 2015  
Posted by: Natalia Gromov
Al-Delaimy WK, Myers MG, Leas EC, Strong DR, Hofstetter CR.
E-Cigarette Use in the Past and Quitting Behavior in the Future: A Population-Based Study.
Am J Public Health. 2015 Apr 16:e1-e7. [Epub ahead of print]
 
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.

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). 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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