RT Journal Article
T1 Living with Chronic Illness Scale: International validation through the classic test theory and Rasch analysis among Spanish-speaking populations with long-term conditions
A1 Rodríguez Blázquez, Carmen
A1 Forjaz, Maria João
A1 Ayala Garcia, Alba
A1 Portillo, Mari Carmen
A1 Ambrosio, Leire
AB Background: The Living with Chronic Illness (LW-CI) Scale is a comprehensivepatient-reported outcome measure that evaluates the complex process of living withlong-term conditions.Objective: This study aimed to analyse the psychometric properties of the LW-CIscale according to the classic test theory and the Rasch model among individualsliving with different long-term conditions.Design: This was an observational, international and cross-sectional study.Methods: A total of 2753 people from six Spanish-speaking countries living with type2 diabetes mellitus, chronic obstructive pulmonary disease, chronic heart failure,Parkinson's disease, hypertension and osteoarthritis were included. The acceptability,internal consistency and validity of the LW-CI scale were analysed using the classicaltest theory, and fit to the model, unidimensionality, person separation index, item localindependency and differential item functioning were analysed using the Rasch model.Results: Cronbach's α for the LW-CI scale was .91, and correlation values for alldomains of the LW-CI scale ranged from .62 to .68, except for Domain 1, whichshowed correlation coefficients less than .30. The LW-CI domains showed a good fitto the Rasch model, with unidimensionality, item local independency and moderatereliability providing scores in a true interval scale. Except for two items, the LW‐CIscale was free from bias by long-term condition type.Discussion: After some adjustments, the LW-CI scale is a reliable and valid measureshowing a good fit to the Rasch model and is ready for use in research and clinicalpractice. Future implementation studies are suggested.Patient and Public Contribution: Patient and public involvement was conductedbefore this validation study - in the pilot study phase.
PB Wiley
SN 1369-6513
YR 2021
FD 2021-11-29
LK https://hdl.handle.net/10016/34754
UL https://hdl.handle.net/10016/34754
LA eng
NO The authors would like to thank the Ministry of Science, Innovationand University of the Spanish Government for the financial support inthe development of this project. Besides, the authors would like toacknowledge the collaboration of people living with long-term conditionswho participated in this project. The secretary, administrativestaff, nurses, physicians and other healthcare staff who helped duringthe data collection process are also acknowledged. Finally, the authorswould like to acknowledge each member of the EC-PC validationgroup (Supporting Information Appendix) for their outstandingcontribution in the different stages and phases of this macro andinternational project. This study was financially supported in Spain bythe Ministry of Science, Innovation and University of the SpanishGovernment (FEDER/Ministerio de Ciencia, Innovación y Universidades—Agencia Estatal de Investigación/Proyecto[CSO2017–82691-R]).
DS e-Archivo
RD 1 sept. 2024