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Post-traumatic stress disorder and the MMPI-2

P H Munley1, D S Bains, W D Bloem

  • 1Veterans Affairs Medical Center, Battle Creek, Michigan 49016.

Journal of Traumatic Stress
|January 1, 1995
PubMed
Summary

Veterans with post-traumatic stress disorder (PTSD) show distinct MMPI-2 profiles, particularly on supplemental scales like Keane PTSD (PK) and Post-Traumatic Stress Disorder (PS). These scales aid in identifying PTSD in veterans.

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Area of Science:

  • Psychological assessment
  • Military mental health
  • Psychometrics

Background:

  • Post-traumatic stress disorder (PTSD) significantly impacts veteran mental health.
  • Accurate assessment of PTSD is crucial for effective treatment.
  • The Minnesota Multiphasic Personality Inventory-2 (MMPI-2) is a widely used psychological assessment tool.

Purpose of the Study:

  • To compare MMPI-2 profiles between veterans with PTSD and a non-PTSD comparison group.
  • To identify specific MMPI-2 scales that differentiate veterans with PTSD.
  • To evaluate the diagnostic utility of MMPI-2 scales for PTSD in a veteran population.

Main Methods:

  • A comparative study involving 27 veterans diagnosed with PTSD and 27 non-PTSD veteran patients.
  • Three multivariate analyses of variance (MANOVAs) were performed on MMPI-2 scales.

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  • Analyses focused on traditional clinical scales, supplemental scales, and content scales.

    • Main Results:

    • The PTSD group showed elevated scores on the F validity scale, and clinical Scales 2 (Depression) and 8 (Schizophrenia).
    • MANOVAs for supplemental and content scales were significant, unlike the traditional clinical scales.
    • The Keane PTSD (PK) and Post-Traumatic Stress Disorder (PS) scales, along with the Anger (ANG) content scale, showed significant differences, with higher scores in the PTSD group.
    • A PK cut-off score of 28 achieved 76% overall classification accuracy.

    Conclusions:

    • MMPI-2 supplemental scales, particularly the PK and PS scales, are effective in differentiating veterans with PTSD.
    • The PK scale demonstrates promising diagnostic utility for PTSD in veterans.
    • These findings support the use of specific MMPI-2 scales in the assessment of PTSD among military personnel.