Predictors of Caregiver Burden in Huntington's Disease

Abstract

Objective: Huntington's disease (HD) is a genetic neurodegenerative condition that is characterized by cognitive, motor, and psychiatric dysfunction. The purpose of this study was to explore which disease characteristics influence caregiver burden in HD.

Methods: Fifty participants with HD and 50 of their caregivers participated in the study at the University of South Florida. Participants were administered a neuropsychological battery, the Unified Huntington's Disease Rating Scale (UHDRS) motor exam, and the Frontal Systems Behavior Scale (FrSBe) self-report. Caregivers completed the Caregiving Appraisal Scale and the FrSBe family-report.

Results: There were significant correlations between caregiver burden and caregiver age and sex, UHDRS motor scores, cognitive functioning, and self and caregiver-reported FrSBe scores. The significant variables were entered into a regression model and explained 63.1% of the variance in caregiver burden scores. Caregiver age, cognitive functioning, and caregiver-reported FrSBe scores continued to be significant predictors of caregiver burden, whereas the other variables were no longer significant.

Conclusions: There were significant relationships between caregiver burden, cognitive functioning, and frontally mediated behaviors, but not motor scores. The results suggest that possible interventions for caregivers may include education to caregivers on how to cope with apathy/executive dysfunction and cognitive decline. Caregiver age was associated with burden, with younger age being associated with increased burden when controlling for symptom severity. This has implications for this population in that HD typically has a younger age of onset than other neurodegenerative diseases and therefore, these caregivers may be particularly at risk for caregiver burden.

Keywords: Behavioral genetics; Genetic disorders; Genotype studies; Huntington’s disease; Movement disorders.