title: An item-response theory analysis of DSM-IV alcohol-use disorder criteria and "binge" drinking in undergraduates.
abstract: OBJECTIVE
  This is the first study to examine the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV), criteria for alcohol-use disorders and heavy episodic (or "binge") drinking in a college sample using item-response theory (IRT) analysis. IRT facilitates assessment of the severity of the criteria, their ability to distinguish between those at greatest and lowest risk, and the value of adding a "binge" drinking criterion.
  
  
  METHODS
  In a sample of undergraduate drinkers (n = 353), we conducted factor analyses to determine whether the criteria best fit a one- or two-factor structure. We then conducted IRT analyses to obtain item-characteristic curves indicating the probability of endorsing a criterion at increasing levels of alcohol-use-disorder risk. These analyses were first conducted including current (i.e., past-year) DSM-IV alcohol-use-disorder criteria only and then rerun adding weekly "binge" drinking.
  
  
  RESULTS
  A single-factor model of the DSM-IV criteria did not differ significantly from a two-factor model. After including "binge" drinking, two factors fit the data slightly better than one factor but with a dominant single factor. Withdrawal was the most severe criterion, whereas tolerance and "larger/longer" were the least severe. Time spent drinking and a combined social/legal difficulties criterion had the best ability to discriminate those at greatest and lowest risk for an alcohol-use disorder. "Binge" drinking showed both low discrimination and low severity.
  
  
  CONCLUSIONS
  To our knowledge, this is the first study to examine DSM-IV criteria in an undergraduate sample using IRT. In this sample, abuse and dependence were intermixed on a continuum of severity, and "binge" drinking was in the least severe region.
authors.affiliation: Department of Psychiatry, New York State Psychiatric Institute, Columbia University, New York, NY 10032, USA. beselerc@nypdrat.cpmc.columbia.edu
authors.forename: Cheryl L
authors.initials: CL
authors.lastname: Beseler
authors.forename: Laura A
authors.initials: LA
authors.lastname: Taylor
authors.forename: Robert F
authors.initials: RF
authors.lastname: Leeman
mesh_terms: D000293:Adolescent; D000328:Adult; D000428:Alcohol Drinking / Q000453:epidemiology* / Q000503:physiopathology; D019973:Alcohol-Related Disorders / Q000175:diagnosis* / Q000503:physiopathology; D039721:Diagnostic and Statistical Manual of Mental Disorders; D004361:Drug Tolerance; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D012720:Severity of Illness Index; D013334:Students / Q000523:psychology*; D013375:Substance Withdrawal Syndrome / Q000453:epidemiology; D013997:Time Factors; D014481:United States; D014495:Universities; D055815:Young Adult
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