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J Trauma Stress. 2005 Aug;18(4):313-22.

Co-occurrence of posttraumatic stress disorder with positive psychotic symptoms in a nationally representative sample.

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  • 1Department of Psychiatry, University of Manitoba, Winnipeg, Manitoba, Canada. sareen@cc.umanitoba.ca


The association between posttraumatic stress disorder (PTSD) and positive psychotic symptoms was examined in the National Comorbidity Survey (N = 5,877). The Composite International Diagnostic Interview (CIDI) was used to make DSM-III-R (Diagnostic and Statistical Manual of Mental Disorders, Third Edition, Revised; American Psychiatric Association, 1987) diagnoses. Posttraumatic stress disorder was found to be associated with an increased likelihood of endorsing one or more psychotic symptoms after adjusting for sociodemographics, psychiatric and medical comorbidity (odds ratios (OR) = 1.83; 95% confidence interval (CI): 1.43-2.45; p < .001). The co-occurrence of PTSD with psychotic symptoms was marked by greater levels of severity (higher total number of PTSD symptoms, greater levels of comorbidity, and high distress) compared with PTSD alone. This is the first population-based study to investigate PTSD in relation to endorsement of positive psychotic symptoms, and a strong association was obtained.

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