Zarit Caregiver Burden Interview (ZBI)
Also known as: ZBI, Zarit Burden Interview, Caregiver Burden Scale
The Zarit Caregiver Burden Interview, developed by Steven H. Zarit and colleagues in 1980, is a widely used assessment tool designed to quantify the subjective burden experienced by informal caregivers of persons with dementia or other chronic illnesses. The 22-item instrument measures emotional, financial, and physical strain related to caregiving and has become a standard in geriatric, gerontology, neurology, and behavioral health settings worldwide.
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When to use it
Administer the Zarit scale to all informal caregivers (family members, friends) of patients with dementia, Parkinson's disease, stroke sequelae, or other chronic disabling conditions. Use at diagnosis and periodically thereafter to detect caregiver distress, identify those at risk for adverse health outcomes or institutionalization of the care recipient, and guide interventions. The scale is appropriate in primary care, specialty neurology and geriatrics clinics, long-term care facilities, research cohorts, and community support programs.
Strengths & limitations
- Strong psychometric properties—Cronbach's α typically 0.88–0.90 indicating excellent internal consistency; test-retest reliability ≥0.71.
- Widely validated across diverse populations and caregiving contexts, including multiple languages and cultural groups.
- Clinically meaningful—scores predict caregiver depression, health deterioration, and institutionalization of the care recipient.
- Brief and practical—takes 10–15 minutes, suitable for routine clinical assessment and research, with no copyright restrictions for non-commercial use.
- Directly actionable—high scores identify caregivers needing support and guide intensity of intervention (counseling, respite, education).
- Self-report bias—responses reflect subjective perception of burden, which may be influenced by mood, personality, or social desirability.
- Does not measure objective burden—financial costs, time spent, or medical complexity are not directly captured; subjective perception may not align with objective care demands.
- Limited discrimination at mild levels—the scale may be less sensitive to subtle changes in burden in low-burden caregivers.
- Does not assess care recipient characteristics that modify burden—the same scale score may reflect different situations depending on patient behavior, prognosis, or living arrangement.
Frequently asked
Does a high Zarit score mean the caregiver will become depressed?
High scores indicate elevated risk for depression and adverse health outcomes but are not deterministic. Caregivers with strong social support, coping skills, and access to respite care may maintain well-being despite high burden. Conversely, low scores do not guarantee caregiver health. Use the ZBI as one component of comprehensive caregiver assessment and offer proactive support regardless of score level.
Should I administer the ZBI to caregivers of all my patients with dementia?
Yes. Routine caregiver burden screening in dementia clinics enables early identification of at-risk caregivers and allows integration of caregiver support (education, counseling, respite referral, support groups) into standard care. Many clinical practice guidelines recommend caregiver assessment as standard of care.
How often should the ZBI be repeated?
Administer at baseline to establish burden level and guide initial support. Reassess every 3–6 months or when significant care changes occur (progression of disease, change in living arrangement, increase in care hours). More frequent assessment in newly diagnosed caregivers or those with high baseline scores may help detect burden escalation early.
Can I use the ZBI with adult children caring for aging parents?
Yes. The ZBI is appropriate for any informal caregiver relationship. Adult children caring for parents with dementia, stroke, or frailty often experience substantial burden. Use the scale in the same way, with the same cutoffs for clinical significance.
Sources
- Zarit, S. H., Reever, K. E., & Bach-Peterson, J. (1980). Relatives of the impaired elderly: Correlates of feeling burdened. Gerontologist, 20(6), 649-655. link ↗
- Zarit, S. H., Anthony, C. R., & Boutselis, M. (1987). Interventions with care givers of dementia patients: Comparison of two approaches. Psychol Aging, 2(1), 9-15. DOI: 10.1037//0882-7974.2.3.225 ↗
How to cite this page
ScholarGate. (2026, June 3). Zarit Caregiver Burden Interview (ZBI). ScholarGate. https://scholargate.app/en/nursing/zarit-caregiver-burden-scale
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