How do care-related beliefs contribute to depression and anxiety in family caregivers of people with dementia? Testing a cognitive vulnerability-stress model.

Objectives: Care-related beliefs are considered risk factors for decreased mental health in family caregivers of people with dementia. However, their exact role in the caregiver stress process remains unclear. Hence, we tested a cognitive vulnerability-stress model of depression and anxiety in family caregivers of people with dementia.

Method: A cross-sectional study was conducted using baseline data from a caregiver intervention trial (N = 322). Within Bayesian moderated mediation analysis, we examined mediation of effects of objective demands (severity of dementia, challenging behavior, caregiving intensity, caregiving duration) on depression and anxiety via subjective caregiver burden and moderation by care-related beliefs in four domains (dysfunctional caregiving standards, dysfunctional attitudes towards dementia, functional self-care-related beliefs, functional acceptance-related beliefs).

Results: The relation between objective demands and subjective burden was amplified by dysfunctional caregiving standards and dysfunctional attitudes towards dementia and mitigated by functional self-care-related beliefs. Further, functional acceptance-related beliefs attenuated the effect of subjective caregiver burden on depression.

Conclusion: The study provides preliminary evidence for a cognitive vulnerability-stress model of depression and anxiety in family caregivers of people with dementia. The results indicate that the four-domain model of care-related beliefs is a valuable framework for future research and may serve as a heuristic model for cognitive-behavioral therapy in this population.