Latent dimensions of posttraumatic stress disorder and their relations with alcohol use disorder
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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.
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.
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.
All four factors of PTSD’s dysphoria model demonstrate comparable correlations with AUD. The role of dysphoria to the construct of PTSD is discussed.
KeywordsPosttraumatic stress disorder Alcohol use disorder Cormorbidity Confirmatory factor analysis
Compliance with ethical standards
This project was funded by the Department of Defense Congressionally Directed Medical Research Program W81XWH-O7-1-0409, the “Combat Mental Health Initiative.”
The authors have no perceived or actual conflicts of interest related to this project. The sponsor had no role in study design, data collection, analysis, interpretation of results, report writing or manuscript submission.
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