title: The next generation of users: prevalence and longitudinal patterns of tobacco use among US young adults.
abstract: OBJECTIVE
  We monitored the prevalence and patterns of use of the array of tobacco products available to young adults, who are at risk for initiation and progression to established tobacco use.
  
  
  METHODS
  We used data from waves 1 to 3 of GfK's KnowledgePanel (2011-2012), a nationally representative cohort of young adults aged 18 to 34 years (n = 2144). We examined prevalence and patterns of tobacco product use over time, associated demographics, and state-level tobacco policy. We used multivariable logistic regression to determine predictors of initiation of cigarettes as well as noncombustible and other combustible products.
  
  
  RESULTS
  The prevalence of ever tobacco use rose from 57.28% at wave 1 to 67.43% at wave 3. Use of multiple products was the most common pattern (66.39% of tobacco users by wave 3). Predictors of initiation differed by product type and included age, race/ethnicity, policy, and use of other tobacco products.
  
  
  CONCLUSIONS
  Tobacco use is high among young adults and many are using multiple products. Efforts to implement policy and educate young adults about the risks associated with new and emerging products are critical to prevent increased initiation of tobacco use.
authors.affiliation: Amanda Richardson, Jessica Rath, and Donna Vallone are with the Department of Research and Evaluation, Legacy, Washington, DC, and the Department of Health, Behavior and Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD. Valerie Williams is with the Department of Research and Evaluation, Legacy. Andrea C. Villanti is with The Schroeder Institute for Tobacco Research and Policy Studies, Legacy, and the Department of Health, Behavior and Society, Johns Hopkins Bloomberg School of Public Health.
authors.forename: Amanda
authors.initials: A
authors.lastname: Richardson
authors.forename: Valerie
authors.initials: V
authors.lastname: Williams
authors.forename: Jessica
authors.initials: J
authors.lastname: Rath
authors.forename: Andrea C
authors.initials: AC
authors.lastname: Villanti
authors.forename: Donna
authors.initials: D
authors.lastname: Vallone
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008385:Marijuana Smoking / Q000453:epidemiology; D015995:Prevalence; D012907:Smoking / Q000453:epidemiology; D012959:Socioeconomic Factors; D013219:State Government; D064424:Tobacco Use / Q000453:epidemiology* / Q000517:prevention & control; D014481:United States / Q000453:epidemiology; D055815:Young Adult