WHODAS 2.0 as a Measure of Severity of Illness: Results of a FLDA Analysis

Computational and Mathematical Methods in Medicine
Alba Sedano-CapdevilaEnrique Baca-García

Abstract

WHODAS 2.0 is the standard measure of disability promoted by World Health Organization whereas Clinical Global Impression (CGI) is a widely used scale for determining severity of mental illness. Although a close relationship between these two scales would be expected, there are no relevant studies on the topic. In this study, we explore if WHODAS 2.0 can be used for identifying severity of illness measured by CGI using the Fisher Linear Discriminant Analysis (FLDA) and for identifying which individual items of WHODAS 2.0 best predict CGI scores given by clinicians. One hundred and twenty-two patients were assessed with WHODAS 2.0 and CGI during three months in outpatient mental health facilities of four hospitals of Madrid, Spain. Compared with the traditional correction of WHODAS 2.0, FLDA improves accuracy in near 15%, and so, with FLDA WHODAS 2.0 classifying correctly 59.0% of the patients. Furthermore, FLDA identifies item 6.6 (illness effect on personal finances) and item 4.5 (damaged sexual life) as the most important items for clinicians to score the severity of illness.

References

Sep 1, 1992·The American Journal of Psychiatry·H H GoldmanT R Lave
Jul 1, 1992·Pharmacopsychiatry·M Beneke, W Rasmus
Jun 1, 1996·International Clinical Psychopharmacology·D V SheehanB A Raj
May 21, 2003·Acta Psychiatrica Scandinavica. Supplementum·J M HaroUNKNOWN SOHO Study Group
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Jan 2, 2015·Journal of Affective Disorders·Georgina GuileraUNKNOWN Spanish Working Group in Cognitive Function
Mar 10, 2017·International Journal of Methods in Psychiatric Research·María Luisa BarrigónUNKNOWN MEmind study group

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Citations

Aug 17, 2020·Current Opinion in Psychiatry·Daphne van Hoeken, Hans W Hoek
Oct 6, 2020·Social Psychiatry and Psychiatric Epidemiology·Sanjida Khan, Shamsul Haque
Jul 16, 2021·Disability and Rehabilitation·Laíla Cândida ZacariasCamila Ferreira Leite

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Software Mentioned

MEmind
WHODAS
Fisher Linear Discriminant Analysis ( FLDA )
FLDA

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