Classical test theory and item response theory produced differences on estimation of reliable clinical index in World Health Organization Disability Assessment Schedule 2.0.

Autor: Mancheño JJ; Community Mental Health Units, Juan Ramón Jiménez Hospital, Huelva, Spain., Cupani M; Instituto de Investigaciones Psicológicas, Faculty of Psychology, University of Cordoba, Córdoba, Argentina., Gutiérrez-López M; Community Mental Health Units, Juan Ramón Jiménez Hospital, Huelva, Spain., Delgado E; Department of Clinical and Experimental Psychology, University of Huelva, Huelva, Spain., Moraleda E; Department of Clinical and Experimental Psychology, University of Huelva, Huelva, Spain; Research Center on Natural Resources, Health and Environment, University of Huelva, Huelva, Spain., Cáceres-Pachón P; Department of Clinical and Experimental Psychology, University of Huelva, Huelva, Spain., Fernández-Calderón F; Department of Clinical and Experimental Psychology, University of Huelva, Huelva, Spain; Research Center on Natural Resources, Health and Environment, University of Huelva, Huelva, Spain., Lozano Rojas ÓM; Department of Clinical and Experimental Psychology, University of Huelva, Huelva, Spain; Research Center on Natural Resources, Health and Environment, University of Huelva, Huelva, Spain. Electronic address: oscar.lozano@dpsi.uhu.es.
Jazyk: angličtina
Zdroj: Journal of clinical epidemiology [J Clin Epidemiol] 2018 Nov; Vol. 103, pp. 51-59. Date of Electronic Publication: 2018 Aug 06.
DOI: 10.1016/j.jclinepi.2018.07.002
Abstrakt: Objective: World Health Organization Disability Assessment Schedule (WHODAS) 2.0 is currently one of the most used instruments in disability assessment. The objective of this study was to analyze the clinically reliable change of WHODAS 2.0 by applying both Classical Test Theory (CTT) and the Item Response Theory (IRT).
Study Design and Setting: The sample consisted of 179 patients with dual pathology. The standard error of measurement (SEM) was estimated using the CTT and the rating testlet model.
Results: Reliability estimated by Cronbach's alpha provided acceptable values for all domains. The Rasch analysis revealed an adequate capacity to discriminate between people with high and low disability in terms of total scores but not in terms of domains. The SEM varies according to the baseline scores, failing to detect clinically reliable change in patients with lower scores. Kappa coefficients are low for the most of dimensions (except participation) and adequate for total scores.
Conclusion: The use of total WHODAS 2.0 scores may be useful from a clinical perspective; however, more evidence is required for domain scores to support its usefulness. The decision to use the CTT or the IRT impacts in terms of calculating clinically reliable change.
(Copyright © 2018 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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