title: Type of E-Cigarette Device Used Among Adolescents and Young Adults: Findings From a Pooled Analysis of Eight Studies of 2166 Vapers.
abstract: A recent study of adult smokers who vape found that disposable/cigalike electronic (e-) cigarette devices were more commonly used than later generation devices. However, whether these trends reflect patterns among adolescents and young adults, many of whom have limited or no history of combustible cigarette use, has not been studied.
  
  
  
  Participants were drawn from eight locally, regionally, and US nationally representative studies. Surveys took place between Fall 2014 and Spring 2016; participants were residents of California (3 studies), Texas (2 studies), Connecticut (1 study), or randomly selected from the US population (2 studies). Data were collected from middle and high school students (4 studies), young adults under 30 (3 studies), or a mixture (1 study) to assess type of e-cigarette device used among past-30 day e-cigarette users: disposable/cigalike, or later generation e-cigarette device.
  
  
  
  Fewer than 15% of participants in each study reported primarily using a disposable/cigalike device in the past month (across all studies: 7.5%; 95%CI: 4.9%, 10.5%). The proportion using later generation devices ranged from 58% to 86% across studies; overall, 77.0% (95%CI: 70.5%, 82.9%) reported primary use of a later generation device. Combined, 13.2% (95%CI: 5.9%, 22.8%) reported "don't know" or were missing data.
  
  
  
  Among adolescent and young adult e-cigarette users, primary use of disposable/cigalike devices was rare. Future research should continue to evaluate the type of device used by adolescents and young adults, as these data may be relevant to regulatory oversight of e-cigarettes recently acquired by the Food and Drug Administration Center for Tobacco Products.
  
  
  
  In this pooled analysis of adolescent and young adult vapers, primary use of later generation e-cigarette devices was substantially more common than use of disposable/cigalike devices. The type of device predominantly used by adolescents and young adults has regulatory implications for policy to reduce adolescent use of e-cigarettes.
authors.affiliation: Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA.
authors.forename: Jessica L
authors.initials: JL
authors.lastname: Barrington-Trimis
authors.affiliation: Annenberg School for Communication, University of Pennsylvania, Philadelphia, PA.
authors.forename: Laura A
authors.initials: LA
authors.lastname: Gibson
authors.affiliation: Division of Adolescent Medicine, Department of Pediatrics, Stanford University, Palo Alto, CA.
authors.forename: Bonnie
authors.initials: B
authors.lastname: Halpern-Felsher
authors.affiliation: UT Health, School of Public Health, Austin Campus, Austin, TX.
authors.forename: Melissa B
authors.initials: MB
authors.lastname: Harrell
authors.affiliation: Department of Psychiatry, Yale School of Medicine, New Haven, CT.
authors.forename: Grace
authors.initials: G
authors.lastname: Kong
authors.affiliation: Department of Psychiatry, Yale School of Medicine, New Haven, CT.
authors.forename: Suchitra
authors.initials: S
authors.lastname: Krishnan-Sarin
authors.affiliation: Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA.
authors.forename: Adam M
authors.initials: AM
authors.lastname: Leventhal
authors.affiliation: Department of Kinesiology and Health Education, University of Texas at Austin, Austin, TX.
authors.forename: Alexandra
authors.initials: A
authors.lastname: Loukas
authors.affiliation: Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA.
authors.forename: Rob
authors.initials: R
authors.lastname: McConnell
authors.affiliation: Division of Epidemiology and Biostatistics, School of Public Health, Georgia State University, Atlanta, GA.
authors.forename: Scott R
authors.initials: SR
authors.lastname: Weaver
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D000328:Adult; D066300:Electronic Nicotine Delivery Systems / Q000145:classification* / Q000706:statistics & numerical data*; D006801:Humans; D000074285:Smokers / Q000706:statistics & numerical data*; D012907:Smoking / Q000453:epidemiology*; D013334:Students / Q000706:statistics & numerical data*; D011795:Surveys and Questionnaires; D062789:Tobacco Products / Q000706:statistics & numerical data; D014481:United States / Q000453:epidemiology; D000072137:Vaping / Q000453:epidemiology*; D055815:Young Adult