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Assessment of burden among family caregivers of people with Parkinson's disease using the Zarit Burden Interview.
Högskolan Kristianstad.
Ersta Sköndal University College, Department of Health Care Sciences, Palliative Research Centre, PRC.
Högskolan Kristianstad.
Ersta Sköndal University College, Department of Health Care Sciences, Palliative Research Centre, PRC. Linnéuniversitetet, Länssjukhuset i Kalmar.
2016 (English)In: Journal of Pain and Symptom Management, ISSN 0885-3924, E-ISSN 1873-6513Article in journal (Refereed) Epub ahead of print
Abstract [en]

CONTEXT: Previous studies have supported the psychometric properties of the 22-item Zarit Burden Interview (ZBI-22) scale among family caregivers of people with various disorders, including Parkinson´s disease (PD). However, its short-forms have not been psychometrically tested among PD family caregivers, and available psychometric analyses have not accounted for the ordinal nature of item-level data.

OBJECTIVES: To assess the psychometric properties of the ZBI-22 and its short forms among family caregivers of people with PD, while taking account for the ordinal nature of data.

METHODS: Cross-sectional postal survey ZBI-22 data from 66 family caregiver members (59% women; mean age, 69.6 years) of a local Swedish PD society branch were analysed according to classical test theory methods based on polychoric/polyserial correlations.

RESULTS: Missing item responses were ≤5%. Corrected item-total correlations were ≥0.42 and floor-/ceiling effects were <20%, besides for the briefest (4- and 1-item) short-forms (20% and 40% floor effects, respectively). Reliability was good for all scales (ordinal alpha, 0.89-0.95). External construct validity was in general accordance with a priori expectations. Short-forms demonstrated good criterion-related validity (rs 0.87-0.99) and discriminative ability (AUC, 0.91-0.98) relative to the full ZBI-22.

CONCLUSION: This study provides support for the reliability and validity of the ZBI-22 and its various short forms for use among PD family caregivers. In studies where caregiver burden is a central outcome, either ZBI-22 or -12 is suggested for use; other short-forms can be used when caregiver burden is of less central focus or for clinical screening.

Place, publisher, year, edition, pages
2016.
Keyword [en]
Burden, Family Caregivers, Parkinson disease, Psychometrics, Validation
National Category
Nursing
Identifiers
URN: urn:nbn:se:esh:diva-5488DOI: 10.1016/j.jpainsymman.2016.09.007PubMedID: 27810571OAI: oai:DiVA.org:esh-5488DiVA: diva2:1047043
Available from: 2016-11-16 Created: 2016-11-16 Last updated: 2016-11-16Bibliographically approved

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