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Developing Neuroimaging Phenotypes of the Default Mode Network in PTSD: Integrating the Resting State, Working Memory, and Structural Connectivity
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PTSD factor structure differences between veterans with and without a PTSD diagnosis.

Tracey L Biehn1, Jon D Elhai, Thomas H Fine

  • 1Department of Psychology, University of Toledo, 2801 W. Bancroft St., Toledo, OH 43606-3390, United States.

Journal of Anxiety Disorders
|March 6, 2012
PubMed
Summary
This summary is machine-generated.

This study found that the structure of posttraumatic stress disorder (PTSD) symptoms differs between veterans with and without a PTSD diagnosis, impacting symptom severity and measurement. Understanding these differences is crucial for accurate PTSD assessment.

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Area of Science:

  • Psychiatry
  • Psychology
  • Veterans' Health

Background:

  • Posttraumatic stress disorder (PTSD) diagnosis impacts symptom presentation.
  • Understanding the factor structure of PTSD symptoms is essential for accurate diagnosis and treatment.
  • Previous research has proposed different models for the factor structure of PTSD.

Purpose of the Study:

  • To examine differences in the factor structure of PTSD symptoms between veterans with and without a PTSD diagnosis.
  • To compare the fit of two empirically supported four-factor PTSD models (Emotional Numbing and Dysphoria models) in these groups.
  • To investigate measurement invariance of PTSD symptom structure across diagnostic groups.

Main Methods:

  • Utilized an archival dataset of 378 trauma-exposed Canadian veterans.
  • Divided participants into PTSD (n=230) and No-PTSD (n=148) groups based on DSM-IV criteria and structured diagnostic interviews.
  • Conducted confirmatory factor analysis and measurement invariance tests to compare PTSD models.

Main Results:

  • Both the Emotional Numbing and Dysphoria models showed a slightly better fit in the No-PTSD group.
  • Measurement invariance tests revealed significant differences between groups in intercepts, factor means, and residual error variance, but not factor loadings.
  • The PTSD group exhibited greater symptom severity and higher measurement error.

Conclusions:

  • A PTSD diagnosis influences the latent structure of PTSD symptoms.
  • Differences in intercepts, factor means, and residual error suggest varying symptom severity and measurement properties between diagnostic groups.
  • Findings contribute to a nuanced understanding of PTSD symptomology and its diagnostic impact.