Modifying and validating the Composite International Diagnostic Interview (CIDI) for use in Nepal

Area of Science:

• Mental Health Research
• Cross-Cultural Psychiatry
• Epidemiological Surveys

Background:

• Previous attempts to validate structured diagnostic interviews in non-Western countries have faced challenges.
• Cross-national survey methodologies offer principled approaches (translation, harmonization, calibration) for instrument development.
• This study adapted and validated the Composite International Diagnostic Interview (CIDI) for Nepal.

Purpose of the Study:

• To modify and validate the CIDI for use in a Nepali epidemiological survey.
• To assess the feasibility of using structured diagnostic interviews in low-income, non-Western settings.
• To apply cross-national survey methods to mental health instrument development.

Main Methods:

• A five-step process involving translation, harmonization, and calibration was employed to adapt the CIDI.
• The modified Nepali CIDI was validated using a blinded clinical reappraisal design.
• The Structured Clinical Interview for DSM-IV (SCID) served as the gold standard for comparison.

Main Results:

• The adapted CIDI focused on key disorders: major depressive episode, mania/hypomania, panic disorder, PTSD, GAD, and intermittent explosive disorder.
• Iterative translation and revision, guided by established methodologies, resulted in a culturally appropriate instrument.
• The Nepali CIDI demonstrated excellent concordance with SCID diagnoses for lifetime DSM-IV disorders.

Conclusions:

• Fully-structured diagnostic interviews can achieve valid mental disorder assessment in low-income, non-Western contexts.
• Rigorous application of replicable developmental strategies is crucial for successful cross-cultural adaptation.
• This research supports the broader applicability of standardized diagnostic tools in global mental health surveys.