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Related Experiment Videos

Latent variable models of functional somatic distress

J M Robbins1, L J Kirmayer, S Hemami

  • 1Department of Pediatrics, University of Arkansas for Medical Sciences, Arkansas Children's Hospital, Little Rock 72202, USA.

The Journal of Nervous and Mental Disease
|November 5, 1997
PubMed
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This study suggests functional somatic syndromes like fibromyalgia and chronic fatigue may be distinct conditions. Relaxing diagnostic criteria could help identify individuals with focused distress.

Area of Science:

  • Psychiatry
  • Medical Psychology
  • Family Medicine

Background:

  • Functional somatic symptoms are common in primary care.
  • Diagnoses like fibromyalgia syndrome (FMS), chronic fatigue syndrome (CFS), and irritable bowel syndrome (IBS) present overlapping symptoms.
  • Understanding the underlying structure of these syndromes is crucial for accurate diagnosis and treatment.

Purpose of the Study:

  • To investigate the latent structure of functional somatic syndromes using latent variable modeling.
  • To determine if distinct syndromes (somatic depression, somatic anxiety, FM-like, CF-like, IB-like) can be identified within a family medicine patient sample.

Main Methods:

  • Latent variable models were estimated for 686 family medicine patients.
  • Symptom data from the NIMH Diagnostic Interview Schedule were used.

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  • Confirmatory factor analysis was employed to test model fit.

    • Main Results:

    • A model with five latent variables (somatic depression, somatic anxiety, FM-like, CF-like, IB-like) demonstrated a better fit to the data than models with fewer variables.
    • This suggests that these symptom clusters represent relatively discrete entities.

    Conclusions:

    • The findings provide tentative support for functional somatic syndromes as discrete diagnostic categories.
    • Adjusting somatization diagnostic criteria may aid in identifying patients with distress confined to specific functional systems.