title: Trajectories of adolescent alcohol use after brief treatment in an Emergency Department.
abstract: OBJECTIVE
  The primary aim of this study was to identify distinct classes of trajectories of adolescent substance use following a brief motivational interviewing (MI) intervention in an Emergency Department (ED). The secondary aim was to identify predictors of class membership.
  
  
  METHODS
  Latent growth mixture modeling was used with 177 adolescents who participated in two randomized clinical trials evaluating MI for an alcohol-related event.
  
  
  RESULTS
  Three classes were identified: (1) moderate use, decreasers consisting of 56.8% of participants; (2) heavy use, decreasers, consisting of 10.5% of participants, and (3) heavy use sustainers, consisting of 32.7% of participants. Hispanic ethnicity, parental monitoring, and days of high-volume drinking were significant predictors of class membership. Hispanic ethnic status and high levels of parental monitoring were associated with decreased likelihood of belonging to either of the two heavy use classes. More frequent high-volume drinking at baseline was associated with increased likelihood of belonging to the heavy use, sustainer class, and decreased likelihood of belonging to the heavy use, decreaser class. Across all three classes, being female and having frequent high-volume drinking at baseline were associated with worse response to the intervention.
  
  
  CONCLUSIONS
  These findings have important implications for identifying adolescents who may benefit from different or additional intervention, and for anticipating and informing families of adolescents' potential drinking course following treatment.
authors.affiliation: Center for Alcohol and Addiction Studies, Brown University, Box G-121S-5, Providence, RI 02912, United States. Sara_Becker@brown.edu
authors.forename: Sara J
authors.initials: SJ
authors.lastname: Becker
authors.forename: Anthony
authors.initials: A
authors.lastname: Spirito
authors.forename: Lynn
authors.initials: L
authors.lastname: Hernandez
authors.forename: Nancy P
authors.initials: NP
authors.lastname: Barnett
authors.forename: Cheryl A
authors.initials: CA
authors.lastname: Eaton
authors.forename: William
authors.initials: W
authors.lastname: Lewander
authors.forename: Damaris J
authors.initials: DJ
authors.lastname: Rohsenow
authors.forename: Peter M
authors.initials: PM
authors.lastname: Monti
mesh_terms: D000293:Adolescent; D000367:Age Factors; D000428:Alcohol Drinking / Q000523:psychology; D000437:Alcoholism / Q000453:epidemiology / Q000523:psychology* / Q000534:rehabilitation; D003863:Depression / Q000150:complications / Q000523:psychology; D004632:Emergency Medical Services; D004636:Emergency Service, Hospital; D005006:Ethnicity; D005246:Feedback; D005260:Female; D006801:Humans; D008297:Male; D015233:Models, Statistical; D016017:Odds Ratio; D010290:Parents; D012737:Sex Factors; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires