SHARE(D) Stage II: Alzheimer's Risk Disclosure Protocol Piloting

University of Michigan

Status: Completed

Conditions: Mild Cognitive Impairment; Healthy Aging

Treatments: Behavioral: Personalized DAT Risk Disclosure Protocol

Study type: Interventional

Funder types: Other; NIH

Identifiers

NCT04309500

HUM00178869

1R03AG063222-01 (U.S. NIH Grant/Contract)

Details and patient eligibility

About

The goal of this study is to test efficacy and safety of person-centered, culturally-informed protocols for disclosure of different combinations of Alzheimer's dementia risk factors. Building on the results from a federally-funded assessment of preferences and needs of racially diverse participants and their respective friends/family members, in regard to Dementia - Alzheimer's Type (DAT), we have produced protocols for communication of DAT risk, with attention to specific adaptations in style or content based on individual factors and preferences. These protocols allow for communication of risk based on clinical history and diagnosis, structural neuroimaging, apolipoprotein-E status, and amyloid and tau burden on positron emission tomography. In particular, protocols specify (a) effective methods of communicating risk conferred by each data source, (b) information designed for patients versus informants, (c) psychoeducation needs, and (d) resource/support needs. We will recruit a randomly-selected subset of 10 dyads (including 5 participants who are Non-Hispanic African-American, 5 participants who are Non-Hispanic White) from the Stage I sample to whom we will develop and implement personalized DAT risk disclosure protocols. We will provide preliminary information on the effectiveness of these protocols in terms of patient/co-participant comprehension and recall of feedback provided, and initial changes in mood or behavior immediately following and shortly after risk disclosure sessions.

Full description

Currently, a divide exists between Dementia - Alzheimer's Type (DAT) risk information that is shared in clinical settings versus genetic and biomarker-based risk information gathered and, less frequently, disseminated in research settings. Clinical feedback continues to discuss DAT risk in terms of personal/family history, neuropsychological or neurological testing, and standard neuroimaging reports. Research advances in genotyping, quantitative neuroimaging, and amyloid and tau positron emission tomography (PET) have improved our risk prediction and disease staging; however, the literature on how to share these important findings is sparse. Effective risk disclosure protocols are fundamentally dependent on the needs of recipients. However, we do not know how patients, or those tasked with current or future caregiving, decide what sources or types of risk information they want disclosed, nor their reasons for preferring certain types of information over others. Given the differences between static (e.g., family history, genotyping) and dynamic, potentially modifiable risk factors (e.g., amyloid burden), as well as varying familiarity with research-based biomarkers, it is especially important to understand how much information patients hope to receive and what they hope to do with it. This knowledge gap is particularly pertinent in minority and low-income populations given systemic challenges and cultural beliefs that may affect their psychological, physical, and financial ability to adapt to a high risk profile. Thus, understanding risk disclosure needs and preferences is a critical step in developing culturally-informed feedback protocols.

Aim 1 (accomplished during the Stage I observational Needs Assessment - HUM00160276) was to investigate the preferences and needs of racially diverse participants, and their respective informants, in regards to receiving feedback about their risk for DAT.

Aim 2 is to develop person-centered, culturally-informed protocols for disclosure of different combinations of Alzheimer's dementia risk factors. Building on the results of Aim 1, we have produced protocols for communication of DAT risk, with attention to specific adaptations in style or content based on individual factors and preferences. In particular, protocols specify (a) effective methods of communicating risk conferred by each data source, (b) information designed for patients versus informants, (c) psychoeducation needs, and (d) resource/support needs. We will recruit a randomly-selected subset of 10 dyads (including 5 participants who are Non-Hispanic African-American, 5 participants who are Non-Hispanic White) from the Stage I sample to whom we will develop and implement personalized DAT risk disclosure protocols. We will provide preliminary information on the effectiveness of these protocols in terms of patient/co-participant comprehension and recall of feedback provided, and initial changes in mood or behavior immediately following and shortly after risk disclosure sessions.

Enrollment: 20 patients

Sex: All

Ages: 65+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• age 65+ years
• Non-Hispanic Black or Non-Hispanic White race/ethnicity
• Previously participated in Stage I (observational needs assessment)
• Have completed an initial evaluation as part of the University of Michigan Memory and Aging Project (UM-MAP), Stimulation to Improve Memory (STIM) study, or the DAPPER study within the last 12 months.
• Diagnosed with normal cognition or mild cognitive impairment (MCI; single- or -multiple domain, amnestic or non-amnestic forms)
• Able to identify a co-participant who is currently the participant's caregiver, or would serve in this role in the future if needed, and well-known to the participant (known for ≥5 years and have at least weekly phone or in-person contact)
• Able to identify a co-participant who is 18+ years old.
• Able to identify a co-participant who is cognitively healthy

Exclusion criteria

• Current or historical neurologic disorder (e.g., Alzheimer's dementia or other neurodegenerative dementia, Parkinson's disease, seizure disorder, tumor, multiple sclerosis)
• Current or historical significant neurologic injury (e.g., significant stroke or moderate-severe head injury, defined by loss of consciousness > 5 minutes, presence of significant post-traumatic amnesia, or the need for extended hospitalization or intervention).
• Motor symptoms indicative of a neurodegenerative etiology other than Alzheimer's disease
• Severe mental illness (i.e., bipolar disorder, thought disorder, psychosis)
• Severe substance use disorder

Trial design

Primary purpose: Treatment

Allocation: Non-Randomized

Interventional model: Single Group Assignment

Masking: None (Open label)

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20 participants in 4 patient groups

Amyloid Positive (Tau Positive or Negative) Participants

Experimental group

Description:

Participants who receive results of elevated amyloid (whether or not tau is also elevated), indicating the presence of Alzheimer's disease brain changes.

Treatment:

Behavioral: Personalized DAT Risk Disclosure Protocol

Amyloid Negative (Tau Positive or Negative) Participants

Experimental group

Description:

Participants who receive results of not-elevated amyloid (whether or not tau is elevated), indicating the absence of Alzheimer's disease brain changes.

Treatment:

Behavioral: Personalized DAT Risk Disclosure Protocol

Co-Participants of Amyloid Positive (Tau Positive or Negative) Participants

Experimental group

Description:

Study partners of participants who receive results of elevated amyloid (whether or not tau is also elevated), indicating the presence of Alzheimer's disease brain changes.

Treatment:

Behavioral: Personalized DAT Risk Disclosure Protocol

Co-Participants of Amyloid Negative (Tau Positive or Negative) Participants

Experimental group

Description:

Study partners of participants who receive results of not-elevated amyloid (whether or not tau is elevated), indicating the absence of Alzheimer's disease brain changes.

Treatment:

Behavioral: Personalized DAT Risk Disclosure Protocol