title: E-Cigarette Use and Intention to Initiate or Quit Smoking Among US Youths.
abstract: OBJECTIVE
  We assessed whether e-cigarette use is associated with (1) intention to smoke cigarettes among never-smoking youths and youth experimenters, and (2) intention to quit smoking among current youth smokers.
  
  
  METHODS
  We categorized participants from the 2012 National Youth Tobacco Survey data (n = 20 193) as never-smoking youth (n = 16 238), youth experimenters (n = 3248), and current youth smokers (n = 707). We matched groups on the basis of a propensity score comprising covariates predicting e-cigarette use.
  
  
  RESULTS
  E-cigarette users who had never smoked cigarettes (adjusted odds ratio [AOR] = 3.62; 95% confidence interval [CI] = 2.04, 6.45) and who had experimented with smoking (AOR = 1.99; 95% CI = 1.50, 2.64) had elevated intention to smoke cigarettes compared with their counterparts who had never used e-cigarettes. We did not find any significant association between e-cigarette use and intention to quit smoking among current youth smokers (P = .33).
  
  
  CONCLUSIONS
  E-cigarette use among US youths is associated with intention to smoke but not with intention to quit smoking.
authors.affiliation: Ji-Yeun Park and Hsien-Chang Lin are with the Department of Applied Health Science, Indiana University School of Public Health, Bloomington. Dong-Chul Seo is with the Department of Health Education and Management, College of Health Sciences, Ewha Womans University, Seoul, South Korea.
authors.forename: Ji-Yeun
authors.initials: JY
authors.lastname: Park
authors.affiliation: Ji-Yeun Park and Hsien-Chang Lin are with the Department of Applied Health Science, Indiana University School of Public Health, Bloomington. Dong-Chul Seo is with the Department of Health Education and Management, College of Health Sciences, Ewha Womans University, Seoul, South Korea.
authors.forename: Dong-Chul
authors.initials: DC
authors.lastname: Seo
authors.affiliation: Ji-Yeun Park and Hsien-Chang Lin are with the Department of Applied Health Science, Indiana University School of Public Health, Bloomington. Dong-Chul Seo is with the Department of Health Education and Management, College of Health Sciences, Ewha Womans University, Seoul, South Korea.
authors.forename: Hsien-Chang
authors.initials: HC
authors.lastname: Lin
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D066300:Electronic Nicotine Delivery Systems / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D033182:Intention; D008297:Male; D057216:Propensity Score; D012907:Smoking; D016540:Smoking Cessation / Q000379:methods / Q000523:psychology; D011795:Surveys and Questionnaires; D014481:United States