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dc.contributor.authorRodriguez-Blazquez, Carmen 
dc.contributor.authorForjaz, Maria João 
dc.contributor.authorAyala, Alba 
dc.contributor.authorPortillo, Mari Carmen
dc.contributor.authorAmbrosio, Leire
dc.contributor.authorEC‐PC Validation Group
dc.identifier.citationHealth Expectations. 2021 Dec;24(6):2065-2077.es_ES
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.es_ES
dc.description.sponsorshipMinistry of Science, Innovation and University, Spanish Government; FEDER/ Ministerio de Ciencia, Innovación y Universidades – Agencia Estatal de Investigación/ Proyecto, Grant/Award Number: CSO2017–82691‐Res_ES
dc.publisherWiley es_ES
dc.relation.isversionofPublisher's versiones_ES
dc.subjectRasch analysises_ES
dc.subjectClassic test theoryes_ES
dc.subjectLiving withes_ES
dc.subjectLong-term conditiones_ES
dc.subjectPerson-centred tooles_ES
dc.subjectPsychometric propertieses_ES
dc.titleLiving with Chronic Illness Scale: International validation through the classic test theory and Rasch analysis among Spanish-speaking populations with long-term conditionses_ES
dc.rights.licenseAtribución 4.0 Internacional*
dc.contributor.funderMinisterio de Ciencia, Innovación y Universidades (España)es_ES
dc.contributor.funderEuropean Regional Development Fund (ERDF/FEDER)es_ES
dc.contributor.funderAgencia Estatal de Investigación (España)es_ES
dc.identifier.journalHealth Expectations: an international journal of public participation in health care and health policyes_ES
dc.repisalud.centroISCIII::Centro Nacional de Epidemologíaes_ES

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Atribución 4.0 Internacional
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