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dc.contributor.authorForjaz, Maria João 
dc.contributor.authorAyala, Alba 
dc.contributor.authorMartinez-Martin, Pablo 
dc.contributor.authorDujardin, Kathy
dc.contributor.authorPontone, Gregory M
dc.contributor.authorStarkstein, Sergio E
dc.contributor.authorWeintraub, Daniel
dc.contributor.authorLeentjens, Albert F G
dc.identifier.citationMov Disord. 2015 Apr;30(4):545-51.es_ES
dc.description.abstractThe Parkinson Anxiety Scale is a new scale developed to measure anxiety severity in Parkinson's disease specifically. It consists of three dimensions: persistent anxiety, episodic anxiety, and avoidance behavior. This study aimed to assess the measurement properties of the scale while controlling for the rater (self- vs. clinician-rated) effect. The Parkinson Anxiety Scale was administered to a cross-sectional multicenter international sample of 362 Parkinson's disease patients. Both patients and clinicians rated the patient's anxiety independently. A many-facet Rasch model design was applied to estimate and remove the rater effect. The following measurement properties were assessed: fit to the Rasch model, unidimensionality, reliability, differential item functioning, item local independency, interrater reliability (self or clinician), and scale targeting. In addition, test-retest stability, construct validity, precision, and diagnostic properties of the Parkinson Anxiety Scale were also analyzed. A good fit to the Rasch model was obtained for Parkinson Anxiety Scale dimensions A and B, after the removal of one item and rescoring of the response scale for certain items, whereas dimension C showed marginal fit. Self versus clinician rating differences were of small magnitude, with patients reporting higher anxiety levels than clinicians. The linear measure for Parkinson Anxiety Scale dimensions A and B showed good convergent construct with other anxiety measures and good diagnostic properties. Parkinson Anxiety Scale modified dimensions A and B provide valid and reliable measures of anxiety in Parkinson's disease that are comparable across raters. Further studies are needed with dimension C.es_ES
dc.description.sponsorshipFunding agencies: This study was supported by a grant from the Michael J Fox Foundation for Parkinson Research (MJFF;
dc.publisherMovement Disorders Societyes_ES
dc.subjectParkinson's diseasees_ES
dc.subjectRasch analysises_ES
dc.subject.meshAdult es_ES
dc.subject.meshAged es_ES
dc.subject.meshAged, 80 and over es_ES
dc.subject.meshAnxiety Disorders es_ES
dc.subject.meshCross-Sectional Studies es_ES
dc.subject.meshHumans es_ES
dc.subject.meshInternational Cooperation es_ES
dc.subject.meshMale es_ES
dc.subject.meshMiddle Aged es_ES
dc.subject.meshParkinson Disease es_ES
dc.subject.meshPsychometrics es_ES
dc.subject.meshRegression Analysis es_ES
dc.subject.meshSeverity of Illness Index es_ES
dc.subject.meshPsychiatric Status Rating Scales es_ES
dc.titleIs the Parkinson Anxiety Scale comparable across raters?es_ES
dc.rights.licenseAtribución-NoComercial-CompartirIgual 4.0 Internacional*
dc.contributor.funderFoundation for Parkinson Research
dc.identifier.journalMovement disorders : official journal of the Movement Disorder Societyes_ES
dc.repisalud.centroISCIII::Escuela Nacional de Sanidades_ES
dc.repisalud.centroISCIII::Centro Nacional de Epidemologíaes_ES

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Atribución-NoComercial-CompartirIgual 4.0 Internacional
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