title: Young Adults' Exposure to Alcohol- and Marijuana-Related Content on Twitter.
abstract: OBJECTIVE
  Twitter is among the most popular social media platforms used by young adults, yet it has been underutilized in substance use research compared with older platforms (e.g., MySpace and Facebook). We took a first step toward studying the associations between exposure to pro-alcohol- and marijuana-related content among young adults via Twitter and current heavy episodic drinking and current marijuana use, respectively.
  
  
  METHODS
  We conducted an online survey of 587 (254 men, 333 women) Twitter users between ages 18 and 25 years in February 2014 using an online survey system that has been previously used in research on health behaviors and attitudes.
  
  
  RESULTS
  Current heavy episodic drinking was significantly associated with higher levels of exposure to pro-alcohol content. Similarly, current marijuana use was significantly associated with higher levels of exposure to pro-marijuana content.
  
  
  CONCLUSIONS
  Our findings suggest that in-depth research regarding young adults' exposure to pro-alcohol- and marijuana-related content via Twitter may provide a foundation for developing effective prevention messages on this social media platform to counter the pro-alcohol and marijuana messages.
authors.affiliation: Department of Psychiatry, Washington University School of Medicine in St. Louis, Missouri.
authors.forename: E Peter
authors.initials: EP
authors.lastname: Cabrera-Nguyen
authors.affiliation: Department of Psychiatry, Washington University School of Medicine in St. Louis, Missouri.
authors.forename: Patricia
authors.initials: P
authors.lastname: Cavazos-Rehg
authors.affiliation: Department of Psychiatry, Washington University School of Medicine in St. Louis, Missouri.
authors.forename: Melissa
authors.initials: M
authors.lastname: Krauss
authors.affiliation: Department of Psychiatry, Washington University School of Medicine in St. Louis, Missouri.
authors.forename: Laura J
authors.initials: LJ
authors.lastname: Bierut
authors.affiliation: Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington.
authors.forename: Megan A
authors.initials: MA
authors.lastname: Moreno
mesh_terms: D000293:Adolescent; D000328:Adult; D000428:Alcohol Drinking / Q000517:prevention & control* / Q000523:psychology*; D003430:Cross-Sectional Studies; D005260:Female; D015438:Health Behavior; D006801:Humans; D008297:Male; D008385:Marijuana Smoking / Q000517:prevention & control* / Q000523:psychology*; D010865:Pilot Projects; D061108:Social Media; D011795:Surveys and Questionnaires; D055815:Young Adult