title: Latent dimensions of posttraumatic stress disorder and their relations with alcohol use disorder.
abstract: OBJECTIVE
  The objective of this study was to evaluate the relationship between factors of posttraumatic stress disorder (PTSD) and alcohol use disorder (AUD) using confirmatory factor analysis (CFA) in order to further our understanding of the substantial comorbidity between these two disorders.
  
  
  METHODS
  CFA was used to examine which factors of PTSD's dysphoria model were most related to AUD in a military sample. Ohio National Guard soldiers with a history of overseas deployment participated in the survey (n = 1215). Participants completed the PTSD Checklist and a 12-item survey from the National Survey on Drug Use used to diagnosis AUD.
  
  
  RESULTS
  The results of the CFA indicated that a combined model of PTSD's four factors and a single AUD factor fit the data very well. Correlations between PTSD's factors and a latent AUD factor ranged from correlation coefficients of 0.258-0.285, with PTSD's dysphoria factor demonstrating the strongest correlation. However, Wald tests of parameter constraints revealed that AUD was not more correlated with PTSD's dysphoria than other PTSD factors.
  
  
  CONCLUSIONS
  All four factors of PTSD's dysphoria model demonstrate comparable correlations with AUD. The role of dysphoria to the construct of PTSD is discussed.
authors.affiliation: St. Cloud VA Health Care System, 4801 Veterans Drive, St. Cloud, MN, 56303, USA. tlbiehn02@gmail.com.|Department of Psychology, University of Toledo, Mail Stop #948, 2801 W. Bancroft St., Toledo, OH, 43606-3390, USA. tlbiehn02@gmail.com.
authors.forename: Tracey L
authors.initials: TL
authors.lastname: Biehn
authors.affiliation: Department of Psychology, University of Toledo, Mail Stop #948, 2801 W. Bancroft St., Toledo, OH, 43606-3390, USA.|VA Boston Healthcare System, Massachusetts Veterans Epidemiology Research and Information Center, Boston, MA, USA.
authors.forename: Ateka A
authors.initials: AA
authors.lastname: Contractor
authors.affiliation: Department of Psychology, University of Toledo, Mail Stop #948, 2801 W. Bancroft St., Toledo, OH, 43606-3390, USA.|Department of Psychiatry, University of Toledo, Mail Stop #948, 2801 W. Bancroft St., Toledo, OH, 43606-3390, USA.
authors.forename: Jon D
authors.initials: JD
authors.lastname: Elhai
authors.affiliation: Department of Psychiatry, University of Toledo, Toledo, OH, USA.
authors.forename: Marijo
authors.initials: M
authors.lastname: Tamburrino
authors.affiliation: Department of Psychiatry, University of Toledo, Toledo, OH, USA.
authors.forename: Thomas H
authors.initials: TH
authors.lastname: Fine
authors.affiliation: Mailman School of Public Health, Columbia University, New York, NY, USA.
authors.forename: Gregory
authors.initials: G
authors.lastname: Cohen
authors.affiliation: Department of Psychiatry, Case Western Reserve University, University Hospitals Case Medical Center, Cleveland, OH, USA.
authors.forename: Edwin
authors.initials: E
authors.lastname: Shirley
authors.affiliation: Department of Psychiatry, Case Western Reserve University, University Hospitals Case Medical Center, Cleveland, OH, USA.
authors.forename: Philip K
authors.initials: PK
authors.lastname: Chan
authors.affiliation: Mental Health Service, VA Ann Arbor Health System, Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA.
authors.forename: Israel
authors.initials: I
authors.lastname: Liberzon
authors.affiliation: Department of Psychiatry, Case Western Reserve University, Cleveland, OH, USA.
authors.forename: Joseph R
authors.initials: JR
authors.lastname: Calabrese
authors.affiliation: Mailman School of Public Health, Columbia University, New York, NY, USA.
authors.forename: Sandro
authors.initials: S
authors.lastname: Galea
mesh_terms: D000328:Adult; D019973:Alcohol-Related Disorders / Q000453:epidemiology*; D015897:Comorbidity; D005163:Factor Analysis, Statistical; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008889:Military Personnel / Q000523:psychology* / Q000706:statistics & numerical data; D009820:Ohio / Q000453:epidemiology; D013313:Stress Disorders, Post-Traumatic / Q000453:epidemiology*
keywords: Alcohol use disorder; Confirmatory factor analysis; Cormorbidity; Posttraumatic stress disorder