title: Electronic cigarette use among Korean adults.
abstract: OBJECTIVE
  We investigated the prevalence and correlates of electronic cigarette (e-cigarette) use in a representative sample of Korean adults.
  
  
  METHODS
  This cross-sectional study used data from the Korean National Health and Nutrition Examination Survey of 2013. We analyzed 5338 subjects (≥19 years old) who provided data on e-cigarette use, sex, age, socioeconomic status, and health risk behaviors. Multivariate analyses were performed using logistic regression.
  
  
  RESULTS
  Using weighted samples, the prevalence of ever and current e-cigarette use were 6.6 and 1.1 %, respectively (11.2 and 2.0 % in men and 2.0 and 0.4 % in women). In multivariate analysis, the probability of ever e-cigarette use was highest in current smokers (OR 29.3, 95 % CI 15.5-55.3), former smokers (OR 6.1, 95 % CI 3.3-11.2), and daily heavy drinkers (OR 1.9, 95 % CI 1.1-3.4). Current e-cigarette use was associated with current smoking (OR 16.2, 95 % CI 4.7-55.4) and weekly heavy drinking (OR 2.7, 95 % CI 1.1-6.7).
  
  
  CONCLUSIONS
  E-cigarette use was strongly associated with conventional cigarette use and with frequent heavy drinking. Dual use e-cigarettes and conventional cigarette use as well as the association between heavy alcohol use and e-cigarettes need further exploration.
authors.affiliation: Department of Family Medicine, Asan Medical Center, University of Ulsan College of Medicine, 88 Olymphic-Ro 43-Gil, Songpa-gu, Seoul, 138-736, South Korea.
authors.forename: Jung Ah
authors.initials: JA
authors.lastname: Lee
authors.affiliation: Department of Family Medicine, Asan Medical Center, University of Ulsan College of Medicine, 88 Olymphic-Ro 43-Gil, Songpa-gu, Seoul, 138-736, South Korea.
authors.forename: Sun Hee
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Department of Family Medicine, Asan Medical Center, University of Ulsan College of Medicine, 88 Olymphic-Ro 43-Gil, Songpa-gu, Seoul, 138-736, South Korea. hjcho@amc.seoul.kr.
authors.forename: Hong-Jun
authors.initials: HJ
authors.lastname: Cho
mesh_terms: D000328:Adult; D000428:Alcohol Drinking / Q000523:psychology; D003430:Cross-Sectional Studies; D066300:Electronic Nicotine Delivery Systems / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D007723:Korea / Q000453:epidemiology; D008297:Male; D040541:Marketing / Q000379:methods; D008875:Middle Aged; D009749:Nutrition Surveys; D015995:Prevalence; D012309:Risk-Taking; D012907:Smoking / Q000453:epidemiology*; D016540:Smoking Cessation; D055815:Young Adult
keywords: E-cigarettes; Electronic cigarettes; Heavy drinking; Smoking