title: The overlap of youth violence among aggressive adolescents with past-year alcohol use-A latent class analysis: aggression and victimization in peer and dating violence in an inner city emergency department sample.
abstract: OBJECTIVE
  The purpose of this study was to identify overlap and violence types between peer and dating aggression and victimization using latent class analysis (LCA) among a sample of aggressive adolescents with a history of alcohol use and to identify risk and protective factors associated with each violence class.
  
  
  METHODS
  From September 2006 to September 2009, a systematic sample of patients (14-18 years old) seeking care in an urban emergency department were approached. Adolescents reporting any past-year alcohol use and aggression completed a survey using validated measures including types of violence (severe and moderate aggression, severe and moderate victimization with both peers and dating partners). Using LCA, violence classes were identified; correlates of membership in each LCA class were determined.
  
  
  RESULTS
  Among this sample (n = 694), LCA identified three classes described as (a) peer aggression (PA) (52.2%), (b) peer aggression + peer victimization (PAPV) (18.6%), and (c) multiple domains of violence (MDV) (29.3%). Compared with those in the PA class, those in the PAPV class were more likely to be male, report injury in a fight, and have delinquent peers. Compared with the PA class, those in the MDV class were more likely to be female, African American, report injury in a fight, carry a weapon, experience negative consequences from alcohol use, and have delinquent peers and more family conflict. Compared with the PAPV class, those in the MDV class were likely to be female, African American, receive public assistance, carry a weapon, experience negative consequences from alcohol use, and use marijuana.
  
  
  CONCLUSIONS
  There is extensive overlap of victimization and aggression in both peer and dating relationships. Also, those with high rates of violence across relationships have increased alcohol misuse and marijuana use. Thus, violence-prevention efforts should consider addressing concomitant substance use.
authors.affiliation: Division of Emergency Medicine, University of Washington, Seattle, WA 98104, USA. laurenkw@u.washington.edu
authors.forename: Lauren K
authors.initials: LK
authors.lastname: Whiteside
authors.forename: Megan L
authors.initials: ML
authors.lastname: Ranney
authors.forename: Stephen T
authors.initials: ST
authors.lastname: Chermack
authors.forename: Marc A
authors.initials: MA
authors.lastname: Zimmerman
authors.forename: Rebecca M
authors.initials: RM
authors.lastname: Cunningham
authors.forename: Maureen A
authors.initials: MA
authors.lastname: Walton
mesh_terms: D000293:Adolescent; D000374:Aggression; D000428:Alcohol Drinking / Q000453:epidemiology*; D019548:Crime Victims / Q000706:statistics & numerical data*; D003430:Cross-Sectional Studies; D003625:Data Collection; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D008297:Male; D010379:Peer Group; D012307:Risk Factors; D012737:Sex Factors; D014505:Urban Population; D014754:Violence / Q000706:statistics & numerical data*