Abstract
Existing instruments for caregiver burden assessment are not specific or sensitive to various aspects of caring for patients with Parkinson's disease. A better understanding of burden may enhance patient care and improve health of both patient and caregiver. The goal of this study was to evaluate the validity of the Parkinson's Disease Caregiver Burden (PDCB) questionnaire, a novel instrument designed to appraise more accurately the burden experienced by caregivers in the setting of Parkinson's disease. Common sources of distress for caregivers were taken from discussions with Parkinson's disease patients, caregivers, and clinicians, and used as the foundation of the PDCB questionnaire items. Fifty patients and their respective caregivers were recruited from three specialist movement disorder clinics. Caregiver burden in the sample was gauged with the PDCB scale and the Caregiver Burden Inventory (CBI). Item sensitivity and questionnaire validity were assessed. In this pilot analysis, the PDCB questionnaire was found to be feasible and reliable. Strong correlations were found between the PDCB questionnaire and the CBI. The PDCB questionnaire contained more relevant items for this population compared with the CBI. Strong initial feasibility, reliability, validity, and sensitivity for the PDCB questionnaire were demonstrated. With further evaluation and development, the PDCB questionnaire may prove to be a valuable supplementary tool to the existing CBI or a standalone instrument for use in the setting of Parkinson's disease.
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