Caregiver Burden Scale

Abstract

The Caregiver Burden Scale (CBS) is a widely recognized, multidimensional psychometric instrument developed by Sölve Elmståhl, Bo Malmberg, and Lena Annerstedt in 1996 to evaluate subjective burden and psychosocial distress among informal caregivers of individuals with chronic disabling conditions, particularly stroke survivors, dementia patients, and frail older adults. Comprising 22 self-report items scored on a 4-point Likert scale ranging from 1 (“Not at all”) to 4 (“Often”), the CBS captures caregiver strain across five empirically validated subscales: General Strain (8 items), Isolation (3 items), Disappointment (5 items), Emotional Involvement (3 items), and Environment (3 items). Across numerous international clinical and epidemiological cohorts, the instrument has consistently demonstrated robust psychometric properties, with subscale Cronbach’s alpha values typically ranging from .70 to .89 and overall internal consistency estimates exceeding .90. Test-retest reliability estimates exhibit high stability over time, with intra-class correlation coefficients routinely reported between .80 and .92. Construct, convergent, and discriminant validities are well-established through significant associations with functional dependency indices (e.g., the Barthel Index and Functional Independence Measure), caregiver depressive symptomatology, quality of life measures (e.g., the Short Form Health Survey), and established burden scales such as the Zarit Burden Interview. The CBS has achieved worldwide adoption in clinical gerontology, physical medicine, neurorehabilitation, and health services research as both a screening instrument for psychological exhaustion and an outcome measure for caregiver psychoeducational interventions.

Keywords

Caregiver Burden Scale, informal caregiving, stroke rehabilitation, subjective caregiver burden, psychometrics, caregiver strain, geriatric assessment, factor analysis, construct validity, neurorehabilitation.

Authors

The Caregiver Burden Scale was conceptualized, developed, and validated by a multidisciplinary team of Swedish clinical gerontologists and social gerontology researchers:

• Sölve Elmståhl, MD, PhD: Professor of Geriatric Medicine, Department of Clinical Sciences, Division of Geriatric Medicine, Lund University, and Skåne University Hospital, Malmö, Sweden. Dr. Elmståhl has authored extensive longitudinal research regarding aging, stroke epidemiology, dementia care, and caregiver health trajectories.
• Bo Malmberg, PhD: Institute of Gerontology, School of Health and Welfare, Jönköping University, Jönköping, Sweden. Dr. Malmberg’s scholarly work focuses on developmental psychology, social gerontology, and informal family care ecosystems.
• Lena Annerstedt, PhD: Department of Community Medicine, Lund University, Malmö, Sweden. Dr. Annerstedt has contributed extensively to psycho-social evaluations of long-term care environments, group living designs, and family caregiver adaptation mechanisms.

Purpose

The primary purpose of the Caregiver Burden Scale is to systematically assess the multifaceted subjective impact of providing informal long-term care to family members or close relatives experiencing chronic functional dependency, severe physical impairment, or progressive cognitive deterioration. Informal caregiving constitutes the foundational backbone of long-term care delivery across modern health systems; however, persistent and unmitigated care provision often precipitates physical morbidity, psychological distress, social alienation, and financial catastrophe for the caregiver—a phenomenon known collectively as caregiver burden.

While early measurement paradigms frequently treated caregiver burden as a unidimensional construct or conflated objective task frequency with subjective distress, Elmståhl and colleagues designed the CBS to disentangle the distinct subjective psychosocial vectors that contribute to caregiver exhaustion. Specifically, the CBS aims to:

• Differentiate Subjective Appraisal from Objective Tasks: Measure how caregivers internally perceive, experience, and emotionally process their responsibilities, rather than merely counting the hours spent providing physical assistance.
• Identify Domain-Specific Vulnerabilities: Profile discrete dimensions of burden—such as relational strain, perceived life disruption, environmental barriers, and emotional conflict—allowing clinicians to pinpoint precisely where an individual’s coping capacity is breaking down.
• Guide Targeted Clinical and Social Interventions: Inform rehabilitation teams, medical social workers, and clinical psychologists regarding the appropriateness of specific supportive strategies, ranging from home architectural modification (environment) to psychotherapy (disappointment and emotional conflict) or respite care (general strain and isolation).
• Serve as an Evaluative Outcome Measure: Track longitudinal shifts in caregiver psychological health and quantify the efficacy of formal interventions, including stroke community rehabilitation programs, caregiver psychoeducational workshops, and community respite care services.

From a theoretical perspective, the instrument fills an imperative clinical void by providing a standardized, parsimonious assessment tool that bridges neurorehabilitation, geriatrics, and family systems medicine. Its widespread deployment spans clinical trials, outpatient stroke surveillance clinics, memory assessment centers, and palliative home health monitoring programs.

Psychological Construct

The Caregiver Burden Scale operationalizes subjective caregiver burden as a complex, multidimensional psychological state emerging from the perceived imbalance between caregiving demands and personal coping resources. Rather than conceptualizing burden as an undifferentiated distress response, the CBS delineates five clearly demarcated psychological dimensions:

1. General Strain

The General Strain dimension encompasses the overarching physical, mental, and temporal toll inflicted by continuous caregiving responsibilities. It captures the subjective exhaustion, chronic fatigue, loss of personal autonomy, and somatic compromise experienced by the caregiver. Caregivers high in general strain feel pervasive depletion of energetic reserves, a sensation of being permanently “tied down” by the relative’s medical needs, and a recurrent desire to escape an overwhelming life situation. It reflects the direct physiological and psychological attrition resulting from chronic caregiving stressors.

2. Isolation

The Isolation dimension measures the progressive narrowing of the caregiver’s social universe and the erosion of informal support networks. It gauges both objective behavioral withdrawal (e.g., ceasing to invite acquaintances into the home due to the relative’s condition or behavioral symptoms) and the subjective affective state of loneliness. Caregivers experiencing heightened isolation find that their personal friendships, familial connections, and community engagements have drastically withered, compounding their vulnerability to depressive episodes through the loss of positive interpersonal reinforcement.

3. Disappointment

The Disappointment dimension reflects an existential and developmental crisis characterized by cognitive dissonance, unfulfilled biographical expectations, and perceived unfairness. Caregivers facing high disappointment grapple with feelings that life has treated them unfairly and that the illness has derailed their personal life trajectory, planned retirement, or developmental milestones. This dimension captures the profound grief associated with ambiguous loss, relational transformation, and the economic sacrifices demanded by long-term caregiving.

4. Emotional Involvement

The Emotional Involvement dimension probes conflicted, stigmatized, or negative emotional reactions directed toward the care recipient. It evaluates intrapsychic friction manifested as embarrassment, shame regarding the relative’s disinhibited or altered behavior, and feelings of resentment or anger toward the patient. These emotional reactions frequently induce secondary guilt, as caregivers struggle to reconcile normative moral expectations of unconditional familial love with the visceral frustration triggered by difficult neurobehavioral symptoms.

5. Environment

The Environment dimension evaluates structural, logistical, and informational barriers within the physical and community milieu that impede care provision. This includes architectural hindrances in the home (e.g., narrow doorways, stairs, lack of adaptive bathroom equipment), challenging neighborhood environments, and profound performance anxiety regarding whether the caregiver possesses adequate technical skills to provide safe and competent medical care. It bridges the gap between external contextual ecology and subjective psychological distress.

Theoretical Framework

The Caregiver Burden Scale is grounded conceptually in several foundational paradigms of psychological stress, human ecology, and developmental sociology:

The Transactional Model of Stress and Coping

Chief among the theoretical underpinnings of the CBS is the Transactional Model of Stress and Coping articulated by Richard Lazarus and Susan Folkman (1984). According to this framework, stress is not an intrinsic property of an external stimulus or an objective physical task; rather, it emerges from a continuous transaction between the person and their environment. The appraisal process involves:

• Primary Appraisal: The caregiver’s evaluation of the relative’s condition and its consequences for personal well-being (e.g., “Does this stroke threaten my health, life plans, and financial security?”).
• Secondary Appraisal: The evaluation of available resources to address those demands (e.g., personal coping skills, environmental adaptations, social network availability).

The CBS measures the net subjective outcome of these cognitive appraisals across physical, social, emotional, and environmental domains, reflecting instances where perceived demands markedly outstrip perceived personal and external resources.

Pearlin’s Caregiver Stress Process Model

The instrument aligns strongly with Leonard Pearlin’s Caregiver Stress Process Model (Pearlin et al., 1990), which posits that caregiving stress proliferates through primary and secondary stressors. Primary stressors originate directly from the patient’s functional and cognitive dependencies, while secondary stressors proliferate into wider life spheres—including intrapsychic strain, career disruption, financial degradation, and social isolation. The CBS explicitly operationalizes this proliferation through its distinct subscales, measuring not merely direct hands-on care strain (General Strain), but the systemic erosion of life satisfaction (Disappointment), social capital (Isolation), and contextual balance (Environment).

Role Strain and Role Conflict Theory

The sociological framework of Role Strain Theory, originally formulated by William J. Goode (1960), provides further explanatory grounding for the CBS. When individuals assume the intensive role of caregiver, it inevitably clashes with pre-existing developmental roles (e.g., spouse, employee, parent, friend). The items measuring insufficient personal time, diminished social interactions, and disrupted life expectations capture the severe role overload and inter-role conflict that family caregivers experience as the patient’s demands monopolize their temporal and cognitive bandwidth.

Validity

The psychometric validity of the Caregiver Burden Scale has been extensively evaluated across diverse clinical populations, cultural translations, and clinical settings:

Construct and Structural Validity

Construct validity was initially established by Elmståhl et al. (1996) in a cohort of primary caregivers of stroke survivors three years post-stroke. Principal components analysis and confirmatory factor structures corroborated the presence of five clear latent dimensions that together accounted for the majority of total variance. The five-factor model has demonstrated exceptional structural invariance across multiple cross-cultural adaptations, including Swedish, English, Turkish, Brazilian Portuguese, and Spanish cohorts.

Convergent and Concurrent Validity

Convergent validity has been established through robust correlations with established clinical and psychometric markers:

• Patient Functional Impairment: Total CBS scores and General Strain scores correlate negatively and significantly with patient functional status as measured by the Barthel Index (r = -.35 to -.55, p < .001) and the Functional Independence Measure (FIM), demonstrating that deeper patient physical dependence directly elevates subjective burden.
• Caregiver Depression and Anxiety: CBS scores exhibit strong positive correlations with caregiver depressive symptom scales, including the Center for Epidemiologic Studies Depression Scale (CES-D; r = .50 to .68, p < .001) and the Hospital Anxiety and Depression Scale (HADS; r = .52 to .65, p < .001).
• Concordance with Other Burden Scales: Concurrent validity against the Zarit Burden Interview (ZBI) has revealed strong positive correlation coefficients (r = .72 to .84, p < .001), confirming that the CBS robustly captures the underlying construct of caregiver burden while providing a more nuanced factor-delineated profile.

Discriminant and Known-Groups Validity

The CBS demonstrates robust known-groups validity. In comparative studies, CBS subscales successfully differentiate between caregivers residing with the patient versus those living separately, caregivers of cognitively impaired vs. cognitively intact stroke survivors, and caregivers managing patients with bowel/bladder incontinence versus those managing continent patients. Moreover, Emotional Involvement scores are significantly higher among caregivers dealing with frontotemporal neurobehavioral symptoms, disinhibition, or post-stroke emotional lability, confirming domain specificity.

Reliability

The Caregiver Burden Scale exhibits exemplary reliability metrics across clinical and community samples:

Internal Consistency

In the seminal validation study by Elmståhl et al. (1996), Cronbach’s alpha for the overall scale was reported at .87. Across subsequent psychometric evaluations in neurological and geriatric populations, overall internal consistency has consistently ranged between .89 and .93. Internal consistency estimates across the five distinct subscales are typically documented as follows:

• General Strain: Cronbach’s alpha = .82 to .89
• Isolation: Cronbach’s alpha = .72 to .80
• Disappointment: Cronbach’s alpha = .70 to .82
• Emotional Involvement: Cronbach’s alpha = .70 to .78
• Environment: Cronbach’s alpha = .68 to .76

Test-Retest Reliability and Stability

Test-retest reliability has been examined over intervals ranging from 7 to 21 days in clinically stable caregiver-patient dyads. Intra-class correlation coefficients (ICC) for the total score routinely fall between .82 and .92, with subscale ICCs ranging from .76 to .88. Pearson test-retest correlation coefficients consistently exceed r = .80, indicating high temporal stability and confirming that the scale is not excessively distorted by fleeting transient moods, making it dependable for tracking true intervention-induced change over time.

Factor Analysis

The factorial validity of the Caregiver Burden Scale has been scrutinized using both exploratory factor analysis (EFA) and confirmatory factor analysis (CFA):

Exploratory Factor Structure

In the original validation by Elmståhl, Malmberg, and Annerstedt (1996), principal component analysis with orthogonal (varimax) rotation was applied to the 22 items. The scree test and eigenvalue criteria (> 1.0) unambiguously supported a 5-factor model explaining over 57% of the total variance:

• Factor 1 (General Strain): Items 1, 2, 3, 4, 5, 6, 7, and 8, with factor loadings ranging from .51 to .78.
• Factor 2 (Isolation): Items 9, 10, and 14, with salient factor loadings ranging from .62 to .81.
• Factor 3 (Disappointment): Items 11, 12, 13, 15, and 16, with factor loadings between .48 and .75.
• Factor 4 (Emotional Involvement): Items 17, 18, and 19, loading strongly between .65 and .84.
• Factor 5 (Environment): Items 20, 21, and 22, displaying loadings between .58 and .79.

Confirmatory Factor Analysis (CFA)

Subsequent psychometric investigations in diverse clinical cohorts have tested competing models (unidimensional, 3-factor, and the original 5-factor model). Structural equation modeling has repeatedly verified that the five-factor correlated model exhibits superior fit indices over alternative specifications:

• Comparative Fit Index (CFI): Values typically range from .92 to .96, surpassing conventional goodness-of-fit thresholds (> .90).
• Tucker-Lewis Index (TLI): Consistently recorded between .91 and .95.
• Root Mean Square Error of Approximation (RMSEA): Estimates range from .048 to .062 (with 90% confidence intervals below .08), indicating close approximate fit to empirical data.
• Standardized Root Mean Square Residual (SRMR): Routinely below .06.

These findings substantiate the multidimensionality of the scale and demonstrate that calculating distinct subscale indices provides meaningful clinical value beyond an aggregate total burden score.

Instrument / Measurement Tool

The Caregiver Burden Scale is a structured psychometric instrument designed for self-administration, but it can also be administered via structured face-to-face or telephone interviews when caregivers experience sensory or literacy difficulties:

• Test Type: Self-administered questionnaire / multidimensional clinical rating scale.
• Target Population: Informal family caregivers (spouses, adult children, relatives, partners) caring for dependent individuals with chronic illness, stroke, neurodegenerative disease, or age-related disability.
• Number of Items: 22 items.
• Administration Time: Approximately 10 to 15 minutes.
• Response Format: 4-point Likert scale:
  • 1 = Not at all
  • 2 = Seldom
  • 3 = Sometimes
  • 4 = Often
• Subscale Allocation:
  • General Strain: Items 1, 2, 3, 4, 5, 6, 7, 8 (8 items)
  • Isolation: Items 9, 10, 14 (3 items)
  • Disappointment: Items 11, 12, 13, 15, 16 (5 items)
  • Emotional Involvement: Items 17, 18, 19 (3 items)
  • Environment: Items 20, 21, 22 (3 items)
• Scoring Procedures:
  • Total Score: Calculated by summing all 22 items (range: 22 to 88) or computing the mean across all answered items (range: 1.0 to 4.0). Higher scores denote greater caregiver burden.
  • Subscale Scores: Typically reported as subscale item means (the sum of subscale items divided by the number of items in that subscale, range: 1.0 to 4.0), allowing direct comparison across dimensions regardless of item count differences.
  • Clinical Cutoff Interpretations (Mean Scores):
    • 1.00 – 1.99: Low subjective burden.
    • 2.00 – 2.99: Moderate subjective burden; caregiver may benefit from targeted support services.
    • 3.00 – 4.00: High to severe subjective burden; indicative of significant psychological exhaustion requiring urgent multidimensional clinical intervention.

Permissions & Fee and Test Year

The Caregiver Burden Scale was published in 1996 in the peer-reviewed medical journal Archives of Physical Medicine and Rehabilitation. The scale was established as an academic, open-access clinical research instrument to advance caregiver support methodologies globally.

• Licensing and Fees: The Caregiver Burden Scale is available free of charge for non-commercial academic research, public health surveillance, and non-profit clinical practice. Commercial enterprises, clinical trials sponsored by pharmaceutical corporations, or software developers integrating the scale into proprietary digital health platforms must seek formal licensing permissions from the original copyright holder (Elsevier / American Congress of Rehabilitation Medicine) and the corresponding authors.
• Permissions: Researchers utilizing the CBS are expected to appropriately cite the original 1996 publication in all dissemination materials. Requests for specific translated adaptations or commercial reprinting should be directed to the journal publisher or the corresponding developer, Prof. Sölve Elmståhl at Lund University.

References

• Elmståhl, S., Malmberg, B., & Annerstedt, L. (1996). Caregiver’s burden of patients 3 years after stroke assessed by a novel caregiver burden scale. Archives of Physical Medicine and Rehabilitation, 77(2), 177–182. https://doi.org/10.1016/S0003-9993(96)90164-1
• Goode, W. J. (1960). A theory of role strain. American Sociological Review, 25(4), 483–496. https://doi.org/10.2307/2092933
• Lazarus, R. S., & Folkman, S. (1984). Stress, appraisal, and coping. Springer Publishing Company.
• Pearlin, L. I., Mullan, J. T., Semple, S. J., & Skaff, M. M. (1990). Caregiving and the stress process: An overview of concepts and their measures. The Gerontologist, 30(5), 583–594. https://doi.org/10.1093/geront/30.5.583
• Zarit, S. H., Reever, K. E., & Bach-Peterson, J. (1980). Relatives of the impaired elderly: Correlates of feelings of burden. The Gerontologist, 20(6), 649–655. https://doi.org/10.1093/geront/20.6.649
• Inci, F. H., & Erdem, M. (2008). Validity and reliability of the Caregiver Burden Scale in Turkish family caregivers of chronic patients. Journal of Clinical Nursing, 17(1), 18–25. https://doi.org/10.1111/j.1365-2702.2007.01994.x
• Graessel, E., Berth, H., Lichte, T., & Grau, H. (2014). Subjective caregiver burden: Validity of the 10-item short version of the Burden Scale for Family Caregivers BSFC-s. BMC Geriatrics, 14, Article 23. https://doi.org/10.1186/1471-2318-14-23

13. Items of the Scale (Questionnaire)