RT Journal Article
T1 Classical test theory and item response theory produced differences on estimation of reliable clinical index in World Health Organization Disability Assessment Schedule 2.0
A1 Mancheño Barba, Juan José
A1 Cupani, Marcos
A1 Gutiérrez López, Maria Luisa
A1 Delgado Rico, Elena
A1 Moraleda Barreno, Enrique
A1 Cáceres Pachón, María Pilar
A1 Fernández Calderón, Fermín
A1 Lozano Rojas, Óscar Martín
AB ObjectiveWorld 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 SettingThe sample consisted of 179 patients with dual pathology. The standard error of measurement (SEM) was estimated using the CTT and the rating testlet model.ResultsReliability 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.ConclusionThe 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
PB Elsevier
SN 0895-4356
YR 2018
FD 2018
LK http://hdl.handle.net/10272/19038
UL http://hdl.handle.net/10272/19038
LA eng
NO Mancheño, J. J., Cupani, M., Gutiérrez-López, M., Delgado, E., Moraleda, E., Cáceres-Pachón, P., Fernández-Calderón, F., & Lozano Rojas, Ó. M. (2018). Classical test theory and item response theory produced differences on estimation of reliable clinical index in World Health Organization Disability Assessment Schedule 2.0. Journal of Clinical Epidemiology, 103, 51–59. https://doi.org/10.1016/j.jclinepi.2018.07.002
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026