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Related Experiment Videos

Understanding cross-national differences in depression prevalence.

G E Simon1, D P Goldberg, M Von Korff

  • 1Center for Health Studies, Group Health Cooperative, Seattle, WA 98101-1448, USA.

Psychological Medicine
|July 10, 2002
PubMed
Summary

Global depression prevalence varies significantly, but the nature of depressive illness appears consistent across cultures. However, onset and persistence rates differ, suggesting variations in diagnostic thresholds or true prevalence.

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Area of Science:

  • Epidemiology
  • Psychiatry
  • Global Health

Background:

  • Previous epidemiological studies highlight substantial cross-national variations in depression prevalence.
  • Understanding these differences is crucial for global mental health initiatives.

Purpose of the Study:

  • To investigate cross-national differences in depression prevalence, symptom patterns, and outcomes.
  • To explore the association between depression and disability across diverse cultural contexts.

Main Methods:

  • A large-scale international study involving 25,916 primary care patients across 14 countries.
  • Utilized the Composite International Diagnostic Interview (CIDI) for psychiatric assessments and the Social Disability Schedule (SDS) for disability.
  • Included a 12-month follow-up assessment for 3,197 patients to evaluate depression onset and persistence.

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Main Results:

  • Major depression prevalence showed a 15-fold variation across study centers.
  • Depressive illness structure was similar across low-, medium-, and high-prevalence centers.
  • Higher prevalence centers exhibited higher rates of depression onset and persistence, along with lower reported disability levels.

Conclusions:

  • Cross-national depression prevalence variations are unlikely due to 'category fallacy' (differences in disorder definition).
  • Identical diagnostic measures may capture different severity levels across cultures.
  • Observed differences in onset and outcome may reflect true prevalence variations or differing diagnostic thresholds.