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Living with Chronic Illness Scale: International validation through the classic test theory and Rasch analysis among Spanish-speaking populations with long-term conditions

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dc.affiliation.dptoUC3M. Departamento de Estadísticaes
dc.contributor.authorRodríguez Blázquez, Carmen
dc.contributor.authorForjaz, Maria João
dc.contributor.authorAyala Garcia, Alba
dc.contributor.authorPortillo, Mari Carmen
dc.contributor.authorAmbrosio, Leire
dc.contributor.funderMinisterio de Ciencia, Innovación y Universidades (España)es
dc.date.accessioned2022-05-10T10:21:19Z
dc.date.available2022-05-10T10:21:19Z
dc.date.issued2021-11-29
dc.description.abstractBackground: The Living with Chronic Illness (LW-CI) Scale is a comprehensive patient-reported outcome measure that evaluates the complex process of living with long-term conditions. Objective: This study aimed to analyse the psychometric properties of the LW-CI scale according to the classic test theory and the Rasch model among individuals living 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 type 2 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 classical test theory, and fit to the model, unidimensionality, person separation index, item local independency 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 all domains of the LW-CI scale ranged from .62 to .68, except for Domain 1, which showed correlation coefficients less than .30. The LW-CI domains showed a good fit to the Rasch model, with unidimensionality, item local independency and moderate reliability providing scores in a true interval scale. Except for two items, the LW‐CI scale was free from bias by long-term condition type. Discussion: After some adjustments, the LW-CI scale is a reliable and valid measure showing a good fit to the Rasch model and is ready for use in research and clinical practice. Future implementation studies are suggested. Patient and Public Contribution: Patient and public involvement was conducted before this validation study - in the pilot study phase.en
dc.description.sponsorshipThe authors would like to thank the Ministry of Science, Innovation and University of the Spanish Government for the financial support in the development of this project. Besides, the authors would like to acknowledge the collaboration of people living with long-term conditions who participated in this project. The secretary, administrative staff, nurses, physicians and other healthcare staff who helped during the data collection process are also acknowledged. Finally, the authors would like to acknowledge each member of the EC-PC validation group (Supporting Information Appendix) for their outstanding contribution in the different stages and phases of this macro and international project. This study was financially supported in Spain by the Ministry of Science, Innovation and University of the Spanish Government (FEDER/Ministerio de Ciencia, Innovación y Universidades—Agencia Estatal de Investigación/Proyecto [CSO2017–82691-R]).en
dc.format.extent12
dc.identifier.bibliographicCitationRodriguez‐Blazquez, C., Forjaz, M. J., Ayala, A., Portillo, M. C., & Ambrosio, L. (2021). Living with Chronic Illness Scale: International validation through the classic test theory and Rasch analysis among Spanish‐speaking populations with long‐term conditions. In Health Expectations (Vol. 24, Issue 6, pp. 2065–2077). Wiley.en
dc.identifier.doihttps://doi.org/10.1111/hex.13351
dc.identifier.issn1369-6513
dc.identifier.publicationfirstpage2065
dc.identifier.publicationissue6
dc.identifier.publicationlastpage2077
dc.identifier.publicationtitleHEALTH EXPECTATIONSen
dc.identifier.publicationvolume24
dc.identifier.urihttps://hdl.handle.net/10016/34754
dc.identifier.uxxiAR/0000030519
dc.language.isoengen
dc.publisherWileyen
dc.relation.projectIDGobierno de España. CSO2017–82691-Res
dc.rights© 2021 The Authors.en
dc.rightsAtribución 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subject.ecienciaBiología y Biomedicinaes
dc.subject.otherClassic test theoryen
dc.subject.otherLiving withen
dc.subject.otherLong-term conditionen
dc.subject.otherPerson-centred toolen
dc.subject.otherPsychometric propertiesen
dc.subject.otherRasch analysisen
dc.subject.otherSpanishen
dc.titleLiving with Chronic Illness Scale: International validation through the classic test theory and Rasch analysis among Spanish-speaking populations with long-term conditionsen
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
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