• Kelvin Choi and Jean L Forster.
• Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, Minnesota. Electronic address: choix137@umn.edu.
• Am J Prev Med. 2014 Feb 1; 46 (2): 175-8.

BackgroundPrevious 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.PurposeTo identify the beliefs predicting subsequent use of e-cigarettes.MethodsA total of 1379 young adults (mean age=24.1 years) from the Minnesota Adolescent Community Cohort who reported never using e-cigarettes at baseline (collected Oct 2010-Mar 2011) and completed follow-up data collection (during Oct 2011-Mar 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.ResultsAt 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 (p<0.05). These associations did not differ by smoking status.ConclusionsGiven 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.© 2013 American Journal of Preventive Medicine Published by American Journal of Preventive Medicine All rights reserved.

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