Prevalence and correlates of prior experimentation with e-cigarettes over conventional cigarettes among adolescents: Findings from the 2015 Korea Youth Risk Behaviour Web-based Survey
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Department of Family Medicine, BHS Hanseo Hospital, Busan, South Korea
Cancer Epidemiology Intelligence Division, Cancer Council Victoria, Melbourne, Australia
Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, South Korea
Cheol Min Lee   

Department of Family Medicine, Healthcare System Gangnam Center, Seoul National University Hospital, 39th Fl, Gangnam Finance Center, 151 Teheran-ro, Yeoksam-dong, Gangnam-gu, Seoul, South Korea
Publish date: 2019-10-07
Submission date: 2019-07-15
Final revision date: 2019-09-23
Acceptance date: 2019-09-25
Tob. Prev. Cessation 2019;5(October):33
As concern is increasing about electronic cigarette use among neversmoking youth, we aimed to examine the prevalence and correlates of prior experimentation of electronic cigarettes (e-cigs) over conventional cigarettes (c-cigs).

We used the 10th Korea Youth Risk Behavior Web-based Survey in 2015, including 67960 participants as study subjects. This survey was designed as stratified multistage clustered samples from middle schools and high schools. Weighted percentages of vaping and/or smoking status by the timing of experimentation were calculated and multivariate logistic regression analysis was conducted after adjustments for possible confounders (demographics, socioeconomic status, lifestyle, tobacco use pattern).

Youth who use e-cigs only or before c-cigs were 1.7% and 9.1% of any type user, respectively. In younger participants, the proportion tended to be increasing. Apart from being younger (AOR=2.23, 95% CI: 1.66–2.99; 12th grade vs 7th grade), male gender (AOR=1.20, 95% CI: 1.03–1.42), higher household income (AOR=1.21, 95% CI: 1.01–1.45), higher school performance (AOR=1.19, 95% CI: 1.02–1.39), exposure to smoke (AOR=1.63, 95% CI: 1.43–1.86) and caffeine drink (AOR=1.44, 95% CI: 1.24–1.68) were associated with experimentation with e-cigs prior to c-cigs in a fully-adjusted model. Alcohol abuse (AOR=0.57, 95% CI: 0.48–0.68) and weekday internet usage for recreation (AOR=0.69, 95% CI: 0.60–0.78) were negatively associated.

The characteristics of those who experiment with e-cigs over c-cigs may be different from the general characteristics of vaping. Considering recent e-cig epidemics, more attention should be paid to the adolescents who tend to start e-cigs first.

The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none was reported.
There was no source of funding for this research.
All authors contributed to the design and interpretation of the work. JHH, CS and CML drafted the manuscript, and CS undertook English proofreading. All authors provided critical revisions for important intellectual content for the final version. All authors agreed to be accountable for all aspects of the work, and all authors have approved the final version of the manuscript.
Not commissioned; externally peer reviewed.
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