Background: Previous cross-sectional studies found that positive beliefs about electronic nicotine
delivery systems (commonly known as electronic cigarettes or e-cigarettes) were associated with use
of these products. However, the prospective association between these beliefs and subsequent use of
e-cigarettes is unclear.
Purpose: To identify the beliefs predicting subsequent use of e-cigarettes.
Methods: A total of 1379 young adults (mean age¼24.1 years) from the Minnesota Adolescent
Community Cohort who reported never using e-cigarettes at baseline (collected Oct 2010Mar
2011) and completed follow-up data collection (during Oct 2011Mar 2012) were included in
this analysis. Participants beliefs about e-cigarettes (potential as quit aids, harmfulness and
addictiveness relative to cigarettes) were asked at baseline (yes/no). At follow-up, participants were
asked if they had ever used e-cigarettes. Logistic regression models were used to assess the
associations between beliefs about e-cigarettes and subsequent experimentation. Analysis was
conducted in 2012.
Results: At follow-up, 7.4% of the sample reported ever using e-cigarettes (21.6% among baseline
current smokers, 11.9% among baseline former smokers, and 2.9% among baseline nonsmokers).
Participants who believed e-cigarettes can help people quit smoking and perceived e-cigarettes to be
less harmful than cigarettes at baseline were more likely to report experimenting with e-cigarettes at
follow-up (po0.05). These associations did not differ by smoking status.
Conclusions: Given that young adults are still developing their tobacco use behaviors, informing
them about the lack of evidence to support e-cigarettes as quit aids and the unknown health risk of
e-cigarettes may deter young adults from trying these products.
(Am J Prev Med 2014;46(2):175178) & 2014 American Journal of Preventive Medicine