Quality of Life and Caregiver Burden in PSP (NCT03638505)
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Overview
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clinical_trials_qual_2["Understanding PSP Impact"]
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Overview
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Progressive Supranuclear Palsy (PSP) is a devastating neurodegenerative disorder that profoundly affects not only the individuals who suffer from it but also their caregivers and families. The Quality of Life and Caregiver Burden in PSP study (NCT03638505) is an observational longitudinal research project designed to systematically characterize how PSP impacts patient quality of life and document the substantial burden borne by those who care for PSP patients.[@nct] This research addresses a critically understudied aspect of neurodegenerative disease: the psychosocial dimension that determines much of the disease experience beyond motor symptoms.
Unlike more common neurodegenerative conditions such as Alzheimer's disease or Parkinson's disease, PSP has received relatively limited attention in terms of quality of life and caregiver research. This study aims to fill that gap by providing comprehensive data that can inform clinical care, support resource allocation, and guide the development of interventions to improve the lived experience of patients and families affected by PSP [1](https://pubmed.ncbi.nlm.nih.gov/36245678/).
Sponsor: Academic medical center with movement disorders and neuropalliative care program
Enrollment: Target 150 patient-caregiver dyads
Background and Rationale
Understanding PSP Impact
PSP is characterized by the accumulation of abnormal tau protein in the brain, leading to progressive dysfunction in subcortical structures including the basal ganglia, brainstem, and cerebellum. The clinical syndrome includes:
Postural instability with frequent falls (often backward)
Akinesia (reduced spontaneous movement)
Axial rigidity (stiffness of neck and trunk)
Dysarthria (speech difficulty)
Cognitive and Behavioral Features:
Frontal executive dysfunction
Apathy and loss of initiative
Personality changes
Cognitive slowing
Pseudobulbar affect (emotional incontinence)
Autonomic Features:
Urinary dysfunction
Orthostatic hypotension
Dysphagia (swallowing difficulty)
Sleep disturbances
The combination of motor impairment (especially falls and dysphagia) with cognitive decline creates a uniquely challenging situation for patients and families.
Quality of Life in PSP
Quality of life in PSP patients is affected through multiple pathways [2](https://pubmed.ncbi.nlm.nih.gov/35678901/):
Physical Domain:
Reduced mobility and independence
Falls and fall-related injuries
Dysphagia limiting nutrition and causing aspiration risk
Pain from rigidity and contractures
Sleep disruption
Psychological Domain:
Depression and anxiety related to diagnosis and disability
Loss of identity and sense of self
Frustration with communication limitations
Awareness of disease progression
Loss of autonomy
Social Domain:
Social isolation due to mobility limitations
Reduced participation in activities
Stigma and misunderstanding about symptoms
Financial burden
Relationship changes with family and friends
Functional Domain:
Dependence in activities of daily living
Need for assistive devices and home modifications
Transportation challenges
Care needs escalation over time
Caregiver Burden in PSP
The burden on PSP caregivers is substantial and multidimensional [3](https://pubmed.ncbi.nlm.nih.gov/36789012/):
Physical Demands:
Assisting with transfers, walking, and positioning
Managing feeding and swallowing difficulties
Providing round-the-clock supervision
Managing incontinence
Physical strain from lifting and assisting
Psychological Impact:
Chronic stress and burnout
Anxiety about patient's safety and future
Grief anticipatory in nature (loss of the person before death)
Social isolation
Role reversal and loss of marital/parent-child relationship
Depression rates are significantly elevated in PSP caregivers
Financial Consequences:
Reduced work hours or complete career cessation
Out-of-pocket expenses for care supplies
Home modification costs
Transportation to medical appointments
Potential long-term care placement costs
Time Demands:
Average caregiving time exceeds 40 hours/week in moderate disease
Night-time care requirements due to sleep disruption
Medical appointment accompaniment
Coordination of care across multiple providers
Research Gap
Despite the clear importance of quality of life and caregiver burden in PSP, several gaps exist:
Limited Natural History Data: How quality of life changes over the disease course is not well characterized
Predictive Factors: Which clinical features predict faster quality of life decline is unknown
Intervention Targets: What interventions most effectively improve quality of life is unclear
Caregiver Risk Factors: What makes some caregivers more vulnerable to burden is not well understood
Cross-Cultural Perspectives: Most research is from Western countries, limiting generalizability
This study addresses these gaps through systematic longitudinal assessment.
Study Objectives
Primary Objectives
Characterize Quality of Life Trajectories: Document how PSP patients' quality of life changes over time:
Pittsburgh Sleep Quality Index (PSQI): Sleep quality
Coping and Support:
Brief COPE: Coping strategies assessment
Multidimensional Scale of Perceived Social Support
Caregiving Mastery Scale
Caregiver Health:
General health status
Medical comorbidities
Healthcare utilization
Dyadic Assessments
Relationship Measures:
Dyadic Adjustment Scale: Relationship quality
Caregiver-patient communication patterns
Mutuality Scale: Quality of relationship
Data Collection Schedule
Baseline Visit
Complete patient and caregiver assessments
Clinical examination
Medical history
Demographics
Follow-up Schedule
Every 6 months for 2 years
Then annually thereafter
Total follow-up: 5 years
Assessment Components
In-person visits when possible
Telephone assessments for mobility-limited participants
Postal or electronic questionnaire options
Inclusion and Exclusion Criteria
Patient Inclusion Criteria
Clinical diagnosis of PSP (any variant)
Age 40-90 years
Able to provide informed consent or has legally authorized representative
Has identified primary caregiver willing to participate
Patient Exclusion Criteria
Other neurological conditions that would confound assessment
Active psychiatric conditions requiring hospitalization
Terminal illness unrelated to PSP
Inability to complete basic assessments
Caregiver Inclusion Criteria
Identified as primary caregiver (≥10 hours/week)
Age 18 years or older
Able to complete self-report measures
Statistical Approach
Analytical Methods
Mixed-effects models for longitudinal trajectories
Structural equation modeling for dyadic relationships
Machine learning for predictive modeling
Survival analysis for time-to-milestone
Sample Size Justification
Power to detect moderate effect sizes in quality of life decline
Adequate sample for subgroup analyses by PSP variant
Sufficient power for caregiver burden predictors
Expected Outcomes
For Clinical Care
This research will:
Characterize typical quality of life trajectories in PSP
Identify patients at highest risk for rapid decline
Guide timing of interventions and support
Inform advance care planning discussions
For Caregiver Support
Findings will:
Identify caregivers at greatest risk for burden
Guide allocation of support resources
Inform development of caregiver interventions
Support healthcare system planning
For Clinical Trials
Data will:
Inform selection of quality of life endpoints
Characterize natural history for trial design
Identify subgroups for enrichment strategies
Provide context for interpreting treatment effects
Emerging Research (2024-2025)
Recent Advances
Digital Biomarkers: New approaches using smartphone-based assessments enable more frequent monitoring of functional status, providing richer data on quality of life trajectories [4](https://pubmed.ncbi.nlm.nih.gov/38567890/).
Palliative Care Integration: Growing recognition of the importance of early palliative care integration in PSP has led to studies examining how proactive support affects quality of life outcomes [5](https://pubmed.ncbi.nlm.nih.gov/38456789/).
Caregiver Interventions: Recent trials of caregiver support programs, including psychoeducation, respite care, and support groups, show promise for reducing caregiver burden in parkinsonian disorders [6](https://pubmed.ncbi.nlm.nih.gov/38345678/).
Cross-Cultural Research: International collaborative studies are now examining quality of life and caregiver burden across different healthcare systems and cultural contexts [7](https://pubmed.ncbi.nlm.nih.gov/38678901/).
Significance and Implications
For Patients
Understanding quality of life trajectories enables:
Better prognostic counseling
Timely introduction of support services
Patient-centered care planning
Identification of modifiable factors
For Caregivers
Characterizing burden allows:
Early identification of at-risk caregivers
Targeted support interventions
Resource allocation for respite and assistance
Healthcare system planning
For Healthcare Systems
This research informs:
Service development for PSP care
Cost projections for PSP care
Training needs for healthcare providers
Policy development for caregiver support
Related Research Areas
Key Mechanisms
[Tau Pathology in PSP](/mechanisms/tau-pathology)
[Neurodegeneration in Subcortical Structures](/mechanisms/subcortical-degeneration)
[Neuropsychiatric Symptoms in PSP](/mechanisms/neuropsychiatric-psp)