Comparing Global Assessment of Functioning (GAF) and World Health Organization Disability Assessment Schedule (WHODAS) 2.0 in schizophrenia

WHODAS-2.0 is a suggested replacement to the GAF in DSM-5. This study's purpose was to assess their comparative correlation in adults with schizophrenia spectrum disorder. 42 individuals with a diagnosis of schizophrenia or schizoaffective disorder were administered both tools and the PANSS. Pearson product moment correlations were computed and the different methods compared using bootstrap. There was no significant correlation between raw WHODAS-2.0 and GAF scores for all participants and a modest correlation between corrected WHODAS-2.0 and GAF scores for outpatients. The WHODAS-2.0 and GAF did not correlate when WHODAS-2.0 was self-rated, and only modestly correlated when clinician-rater corrected. •Raw WHODAS-2.0 and GAF scores did not correlate in participants with Schizophrenia spectrum disorders.•Clinician-corrected WHODAS-2.0 and GAF scores had a modest correlation in participants with Schizophrenia spectrum disorders.•GAF scores and PANSS scores had a strong correlation in participants with Schizophrenia spectrum disorders.