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. 2018 Mar 25:2018:7353624.
doi: 10.1155/2018/7353624. eCollection 2018.

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

Alba Sedano-Capdevila  1 , María Luisa Barrigón  1   2 , David Delgado-Gomez  3 , Igor Barahona  4 , Fuensanta Aroca  4 , Inmaculada Peñuelas-Calvo  1 , Carolina Miguelez-Fernandez  1 , Alba Rodríguez-Jover  1 , Susana Amodeo-Escribano  1 , Marta González-Granado  1 , Enrique Baca-García  1   2   5   6   7   8   9
Affiliations

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

Alba Sedano-Capdevila et al. Comput Math Methods Med. .

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.

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Figures

Figure 1
Figure 1
Scatter plot of the FLDA scores. Green dots represent ICG-S from 1 to 4 (low severity). Blue dots represent ICG-S of 5 (medium severity). Red dots represent ICG-S of 6 or 7 (high severity).
Figure 2
Figure 2
Classification map.
See this image and copyright information in PMC

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