Unique contributions of specific neuropsychiatric symptoms to caregiver burden in informal caregivers family members of patients with dementia.

INTRODUCTION

We aimed to evaluate how the presence of individual neuropsychiatric symptoms in non-institutionalised patients with dementia is associated with caregiver burden of their informal caregivers, family members.

METHODS

We performed a cross-sectional study on a total of 131 pairs of one informal caregiver family member and non-institutionalised patient with dementia in a family medicine practices in a city of Zagreb, Croatia. Caregiver measures included Zarit Burden Interview (ZBI) whereas patient measures included Mini mental state examination (MMSE), Barthel index and Neuropsychiatric Inventory Questionnaire (NPI-Q).

RESULTS

Total NPI-Q score explained 21% of overall burden. In order of strength of the association, after adjustments for age, sex, MMSE and Barthel index, overall burden was significantly associated with higher NPI-Q scores for agitation/aggression, apathy/indifference, irritability/lability, disinhibition, motor disturbance, appetite/eating, depression/dysphoria, anxiety, elation/euphoria and nighttime behaviours. When evaluating mutually independent contribution of unique NPI-Q symptoms to caregiver burden, agitation/aggression and apathy/indifference remained only two mutually independently associated symptoms, each explaining 5% of overall burden in this context.

CONCLUSIONS

Informal caregivers who provide for family members with dementia suffering from agitation/aggression or apathy/indifference should be recognised as under special risk for the development of caregiver burden and considered as candidates for early targeted interventions.