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Researchers examined whether smokers who used
e-cigarettes are more likely to quit after 1 year
than smokers who had never used e-cigarettes.
They surveyed 1000 California smokers at 2 time
points 1 year apart. They 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 and 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.
For more information
E-Cigarette Use in the Past and Quitting Behavior in
the Future: A Population-Based Study
Published online ahead of print April 16, 2015:
e1-e7. doi:10.2105/AJPH.2014.302482.
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