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Posttraumatic stress disorder and the MCMI-II

P H Munley1, D S Bains, W D Bloem

  • 1Psychology Service, VA Medical Center, Battle Creek, MI 49016, USA.

Psychological Reports
|June 1, 1995
PubMed
Summary

This study examined personality profiles of veterans with Posttraumatic Stress Disorder (PTSD) using the MCMI-II. While overall profiles didn't significantly differ from non-PTSD groups, specific scales showed variations, suggesting nuanced psychological characteristics in PTSD.

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Area of Science:

  • Psychiatry
  • Psychology
  • Veterans' Health

Background:

  • Posttraumatic Stress Disorder (PTSD) is a significant mental health concern, particularly among veterans.
  • Understanding the personality profiles associated with PTSD is crucial for effective diagnosis and treatment.
  • The Millon Clinical Multiaxial Inventory-II (MCMI-II) is a tool used to assess personality traits and clinical syndromes.

Purpose of the Study:

  • To investigate the MCMI-II profile characteristics of veterans diagnosed with PTSD.
  • To compare the MCMI-II profiles of veterans with PTSD to a non-PTSD comparison group.
  • To explore potential response-style biases in MCMI-II assessments for individuals with PTSD.

Main Methods:

  • The study involved 39 veterans diagnosed with PTSD and a comparison group of 39 individuals without PTSD.

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  • Participants completed the MCMI-II, which assesses basic personality, pathological personality, and clinical syndrome scales.
  • Statistical analyses included multivariate analysis of variance (MANOVA) and univariate analyses of variance (ANOVA) with Bonferroni adjustment.

    • Main Results:

    • The mean MCMI-II profile for the PTSD group showed elevations on Avoidant, Passive-Aggressive, Schizoid, Antisocial, Borderline, Schizotypal personality scales, and Anxiety, Dysthymia, Alcohol Dependence, Drug Dependence, and Major Depression clinical syndrome scales.
    • A MANOVA comparing the PTSD and non-PTSD groups on overall MCMI-II scales was not statistically significant.
    • Univariate analyses revealed significant differences between the groups on the Desirability and Histrionic scales.

    Conclusions:

    • While overall MCMI-II profiles did not significantly differentiate veterans with PTSD from a comparison group, specific scale differences were noted.
    • The findings suggest that veterans with PTSD may exhibit particular personality traits and clinical syndromes, aligning with some existing literature.
    • Response-style bias, such as desirability, should be considered when interpreting MCMI-II profiles in veterans with PTSD.