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Related Experiment Videos

Dimensional and categorical approaches to hypochondriasis.

W Hiller1, W Rief, M M Fichter

  • 1Roseneck Center of Behavioural Medicine, Prien, Germany.

Psychological Medicine
|July 10, 2002
PubMed
Summary

The Whiteley Index and Illness Attitude Scales effectively screen for hypochondriacal disorder, differentiating it from somatization. Affective components, like health anxiety, are key indicators of hypochondriasis.

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Area of Science:

  • Psychiatry
  • Psychological Assessment
  • Mental Health

Background:

  • Contrasting the DSM-IV definition of hypochondriasis with dimensional assessments from the Whiteley Index (WI) and Illness Attitude Scales (IAS).
  • Examining the utility of established psychometric instruments in understanding hypochondriacal dimensions.

Purpose of the Study:

  • To evaluate the validity and utility of the WI and IAS in assessing hypochondriacal disorder.
  • To differentiate hypochondriasis from somatization using self-report measures.
  • To identify key components of hypochondriasis, particularly affective and cognitive factors.

Main Methods:

  • Exploratory factor analysis on self-report data from 570 patients with mental and psychophysiological disorders.
  • DSM-IV diagnostic confirmation via structured interviews for 319 patients.

Related Experiment Videos

  • Comparative analysis of WI and IAS performance in case identification and discrimination.

    • Main Results:

    • Confirmed three factors for WI (disease phobia, somatic symptoms, disease conviction) and two for IAS (health anxiety, illness behavior).
    • High overall score correlation (0.80) between WI and IAS.
    • IAS demonstrated superiority in discriminating hypochondriacal disorder from somatization; affective components (health anxieties) were more indicative of diagnostic group membership than somatization symptoms.
    • Optimal cut-offs yielded good sensitivity/specificity (71-72% sensitivity, 79-80% specificity).
    • Disease phobia (WI) and health anxiety (IAS) subscales were most sensitive to treatment changes.

    Conclusions:

    • Self-rating scales (WI and IAS) are valid for screening, case definition, and dimensional assessment of hypochondriacal disorder.
    • These scales effectively differentiate hypochondriasis from somatization.
    • Confirmed the presence of distinct affective and cognitive components within hypochondriasis.