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Risk of substance-related problems in hypochondriasis.

Kayoko Isomura1, Susanna Österman1, Erik Hedman-Lagerlöf2

  • 1Center for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet and Stockholm Health Care Services, Region Stockholm, Stockholm, Sweden.

Psychological Medicine
|January 15, 2026
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Summary
This summary is machine-generated.

Individuals with hypochondriasis (health anxiety disorder) face a significantly higher risk of substance-related problems. Early recognition and awareness of substance misuse are crucial for improving long-term outcomes in this population.

Keywords:
epidemiologyhealth anxiety disorderhypochondriasissubstance-related problems

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Area of Science:

  • Psychiatry
  • Public Health
  • Epidemiology

Background:

  • Hypochondriasis, or health anxiety disorder, is linked to increased mortality, often from preventable causes.
  • The connection between substance misuse and hypochondriasis is not well understood.
  • This study investigates the risk of substance-related problems in individuals diagnosed with hypochondriasis.

Purpose of the Study:

  • To assess the association between a diagnosis of hypochondriasis and the risk of developing substance-related problems.
  • To examine if this association persists after controlling for confounding factors like sociodemographics and psychiatric history.

Main Methods:

  • A Swedish register-based matched cohort study.
  • Included 4,129 individuals diagnosed with hypochondriasis and 41,290 matched controls.
  • Used Cox proportional hazards models to estimate risks for various substance-related problems, adjusting for covariates.

Main Results:

  • Individuals with hypochondriasis had a 2.55-fold increased risk of substance-related problems (HR, 2.55; 95% CI, 2.30-2.84).
  • The association remained significant even after adjusting for psychiatric comorbidities.
  • Elevated risk was also observed in primary care diagnoses of hypochondriasis (HR, 1.61; 95% CI, 1.39-1.86).

Conclusions:

  • Hypochondriasis is significantly associated with an elevated risk of substance-related problems.
  • Clinical awareness and recognition of substance misuse are vital for mitigating adverse outcomes in patients with health anxiety.
  • Further research into the mechanisms underlying this association is warranted.