Effect of caregiver characteristics on dementia management strategies

A validation of the Croatian version of Zarit Burden Interview and clinical predictors of caregiver burden in informal caregivers of patients with dementia: a cross-sectional study

AIM

To validate the Croatian version of the Zarit Burden Interview (ZBI) and to investigate the predictors of perceived burden.

METHODS

This cross-sectional study involved 131 dyads of one informal caregiver family member and one patient with dementia visiting primary care practices (Health Care Center Zagreb-West; 10/2017-9/2018). Patient-related data were collected with the Mini-Mental-State-Examination, Barthel-index, and Neuropsychiatric-Inventory-Questionnaire (NPI-Q); caregiver-related data with the ZBI, and general information on caregivers and patients with a structured questionnaire. Principal-axis-factoring with varimax-rotation was used for factor analysis.

RESULTS

The caregivers' mean age was 62.1±13 years. They were mostly women (67.9%) and patients' children (51.1%). Four dimensions of ZBI corresponding to personal strain, frustration, embarrassment, and guilt were assessed and explained 56% variance of burden. Internal consistency of ZBI (α=0.87) and its dimensions (α1=0.88, α2=0.83, α3=0.72, α4=0.75) was good. Stronger cognitive and functional impairment of patients was associated only with personal strain, whereas more pronounced neuropsychiatric symptoms and the need for daily care were associated with more dimensions. Longer caregiver education suppressed embarrassment and promoted guilt. Guilt was higher in younger caregivers, caregivers of female patients, patients' children, and non-retired caregivers. In multivariate analysis significant predictors of higher overall burden were male sex of the patient, higher NPI-Q, the need for daily-care services, shorter duration of caregiving, non-spouse relationship, higher number of hours caring per-week, and anxious-depressive symptoms in a caregiver.

CONCLUSION

The Croatian version of ZBI is reliable and valid. Our data confirm that ZBI is a multidimensional construct. Caregivers may benefit from individually tailored interventions.

Preliminary investigation of predictors of distress in informal caregivers of patients with delirium superimposed on dementia

OBJECTIVE

Delirium superimposed on dementia (DSD) is common and associated with adverse outcomes. Current evidence indicates that some patients with dementia may recall delirium with distress for them and their caregivers. The aim of this study is to identify predictors of distress in informal caregivers of older patient with DSD.

METHODS

A total of 33 caregivers of 33 patients with DSD were interviewed 3 days after the resolution of delirium (T0) and at 1-month follow-up (T1) to describe their level of distress related to the delirium episode. A linear regression was used to identify predictors of caregivers' distress at T0 and T1 defined a priori: age, sex, level of education, employment status, delirium subtypes, delirium severity, type and severity of dementia, and the time spent with the patient during the delirium episode.

RESULTS

Caregivers were mostly female (81%), 59 (± 13.0) years old on average. The predictors of distress at T0 were the patient's severity of both dementia and delirium. Moderate dementia was associated with lower distress, whereas higher delirium severity was associated with greater distress. At 1-month follow-up, the predictors of distress were the age of caregiver and time spent in care; the distress level was higher when caregivers were older, and they spent less time with their loved one.

CONCLUSIONS

These preliminary findings underline the importance of providing continuous training and support for the caregivers, especially in coping strategies, in order to improve the care of DSD patients and prevent the caregivers' distress in long time period.