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Psychometric properties of the general self-efficacy scale in Parkinson's disease
Lunds universitet.
Högskolan Kristianstad, Forskningsmiljön PRO-CARE. Högskolan Kristianstad, Sektionen för hälsa och samhälle, Avdelningen för Hälsovetenskap I.ORCID-id: 0000-0003-2174-372X
Lunds universitet.
2015 (Engelska)Ingår i: Acta Neurologica Scandinavica, ISSN 0001-6314, E-ISSN 1600-0404, Vol. 132, nr 2, s. 89-96Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

OBJECTIVE: This study aimed to investigate the psychometric properties of the General Self-Efficacy Scale (GSE) in people with Parkinson's disease (PD). More specifically, we investigated data completeness, scaling assumptions, targeting, reliability, and construct validity.

MATERIALS AND METHODS: This study involves data available from two different projects that included people diagnosed with PD for at least 1 year, yielding two samples (1 and 2). The combined total sample (N = 346; 60% men) had a mean (SD) age and PD duration of 71 (8.9) and 9 years (6.3), respectively. Both samples received a self-administered survey by mail, which was administered twice in sample 2. Additional data (e.g., clinical assessments) were available for Sample 1.

RESULTS: Total GSE scores were computable for 336 participants (97%). Corrected item-total correlations exceeded 0.4. Principal component analyses identified one component (the eigenvalue of the first component extracted was 6.9), explaining 69% of the total variance. Floor and ceiling effects were < 6%. Internal consistency (coefficient alpha) was 0.95. Analyses of test-retest reliability yielded (ICC) values from 0.69 to 0.80. The highest value refers to those (n = 47) with identical self-ratings of mobility (in the on condition) at both tests; the standard error of measurement was 3.1 points. Construct validity was further supported by correlations in accordance with a priori expectations.

CONCLUSIONS: This study provides support for the validity and reliability of GSE scores in people with PD; the GSE can thus serve as a valuable outcome measurement in clinical practice and research.

Ort, förlag, år, upplaga, sidor
2015. Vol. 132, nr 2, s. 89-96
Nyckelord [en]
Parkinson's disease, patient outcome assessment, psychometrics, questionnaires, rehabilitation, reliability and validity, self-efficacy
Nationell ämneskategori
Neurovetenskaper
Identifikatorer
URN: urn:nbn:se:hkr:diva-13517DOI: 10.1111/ane.12368ISI: 000357735300003PubMedID: 25630440OAI: oai:DiVA.org:hkr-13517DiVA, id: diva2:787281
Tillgänglig från: 2015-02-09 Skapad: 2015-02-09 Senast uppdaterad: 2018-01-11Bibliografiskt granskad

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