Validity and Reliability of the Japanese Version of the 12-item Self-administered World Health Organization Disability Assessment Schedule (WHODAS) 2.0 in Patients with Schizophrenia

Riho Wada, Masaki Fujiwar, Yuto Yamada, Naoki Nakaya, Maiko Fujimor, Ryuhei So, Masafumi Kodama, Yuji Higuchi, Kyoko Kakeda, Yosuke Uchitomi, N. Yamada, Masatoshi Inagaki

Research output: Contribution to journalArticlepeer-review

Abstract

It is necessary to assess functional impairment when treating schizophrenia. The World Health Organization Disability Assessment Schedule 2.0 (WHODAS 2.0) has been adopted as a measure of functional disability in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition. This study was a secondary analysis from a cross-sectional study of health-related behaviors among patients with schizophrenia. We examined the validity and reliability of the Japanese version of the 12-item WHODAS 2.0 when self-administered by such patients. Participants were 350 outpatients with schizophrenia from a psychiatric hospital. The standard six-factor structure of the WHODAS 2.0 showed a good fit for these participants. The Cronbach’s alpha coefficient was 0.858, showing good internal consistency. The WHODAS 2.0 showed moderate correlations with the modified Global Assessment of Functioning and Kessler 6 scales (r = −0.434 and 0.555, respectively). The results of this study show that the Japanese version of the 12-item self-administered WHODAS 2.0 has good internal consistency and convergent validity among patients with schizophrenia. Further exploration of the usefulness of WHODAS 2.0 in clinical settings is needed.

Original languageEnglish
Pages (from-to)315-322
Number of pages8
JournalActa medica Okayama
Volume75
Issue number3
Publication statusPublished - 2021

Keywords

  • disability
  • reliability
  • schizophrenia
  • validity
  • WHODAS 2.0

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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