Mild Cognitive Impairment, Subjective Memory Decline
Conditions
Brief summary
The purpose of this study is to compare the effects of three on-line wellness interventions for improving physical and cognitive function and brain connectivity in adults who are at least 55 years old and are experiencing symptoms of memory and/or cognitive difficulties.
Detailed description
The proposed study will perform a randomized, controlled trial (RCT) to compare the effects of three on-line wellness interventions for adults (age 55 years and older) who are experiencing memory and/or cognitive decline. Study participants will be randomly assigned to one of three on-line wellness interventions: (a) Tai Chi, (b) mindful movement course, or (c) health and wellness education course. All interventions will be one hour long, held on-line twice a week for 12 weeks. The co-primary outcomes are 3-month change in cognitive function (Alzheimer's Disease Assessment Scale - cognitive subscale, ADAS-cog) and functional brain connectivity within the default mode network (DMN). Secondary behavioral outcomes will include measures of specific cognitive processes (e.g., auditory memory, executive function, processing speed), physical function (e.g., mobility), anxiety, depression, fatigue, pain, sleep quality, social activities/social isolation, and quality of life. Secondary neuroimaging outcomes will include measures of functional connectivity in other intrinsic brain networks (e.g., salience, central executive, language), cerebral perfusion, and structural white matter integrity. The behavioral and imaging outcomes will be assessed at baseline and upon completion of the 12-week interventions. To assess durability of the behavioral effects of the interventions, the cognitive and behavioral outcomes will be assessed again 6 months after the completion of the interventions.
Interventions
BEHAVIORALTai Chi
Tai Chi is an ancient Chinese form of exercise/martial art that involves a series of movements performed in a slow, focused manner and accompanied by deep breathing.
PLIE is a gentle, mindful movement exercise program that integrates elements of Eastern and Western exercise modalities to develop mindful body awareness and enhance social connection.
BEHAVIORALHealth and Wellness Education
This on-line class will consist of hour-long lectures/talks about various topics related to healthy aging and wellness.
Sponsors
University of California, San Francisco
San Francisco VA Health Care System
University of California, Los Angeles
United States Department of Defense
CDMRP
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Masking description
The randomization sequence will be generated in advance by Dr. Chao's research team using a random number generator and will be maintained in a secure location. Individuals who collect or analyze outcome data will be blinded to group assignment.
Intervention model description
Participants will be randomly assigned to an on-line Tai Chi class, an on-line mindful movement class, or to an on-line Health and Wellness Education classes. All classes will meet twice a week for one hour for 12-weeks. The randomization sequence will be generated in advance by Dr. Chao's research team using a random number generator and will be maintained in a secure location. Individuals who collect and analyze outcome data will be blinded to group assignment.
Eligibility
Sex/Gender
ALL
Age
55 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* age ≥ 55 years * subjective cognitive complaints, defined as self-experienced persistent decline in cognitive capacity in comparison with a previously normal status and unrelated to an acute event * Montreal Cognitive Assessment (MoCA) score suggestive of Mild Cognitive Impairment (MCI) status (i.e., \< 26) * English language fluency * Wireless internet connection at home * Willingness to travel to the San Francisco VA in northern California or UCLA in southern California for in-person assessments at baseline, after the 12-week interventions, and at the 36-week follow-up * Capacity to provide informed consent or legally authorized representative consent and participant assent.
Exclusion criteria
* current or past Axis I psychiatric disorders, or recent unstable medical or neurological disorders * disabilities that prevent participation in on-line movement classes (e.g., primarily use wheel-chair, severe visual impairment that would limit ability to observe instructor's movement on screen or severe hearing impairment that would limit ability to hear instructor's directions) * insufficient English proficiency * limited life expectancy (i.e., enrolled in hospice, metastatic cancer) * plan to travel for \> 1 week during 12-week intervention period * diagnosis of dementia per the DSM-5 * MoCA score suggestive of dementia (i.e., \<17) * started dementia medication (cholinesterase inhibitor or memantine) in past 3 months or plans to start dementia medication during study period * planning to start/change any psychoactive medication during study period * current participation in another research study * contraindications to magnetic resonance imaging (MRI), including claustrophobia severe enough to prevent MRI examination, presence of ferrometallic objects in the body that would interfere with MRI examination and/or cause a safety risk (e.g., pacemakers, implanted stimulators, pumps) * prior or current training in with Tai Chi, PLIE, or other mind-body practices
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in Alzheimer's Disease Assessment Scale-Cognitive Subscale (ADAS-cog) Scores | Change from baseline to 1-week post-treatment. | The Alzheimer's Disease Assessment Scale-Cognitive Subscale is a brief neuropsychological assessment used to assess the severity of cognitive symptoms of dementia. ADAS-cog scores range from 0-70, with higher scores (≥ 18) indicating greater cognitive impairment. |
| Change in Default Mode Network (DMN) functional connectivity | Change from baseline to 1-week post-treatment. | The default mode network (DMN) is a system of connected brain areas that show increased activity when a person is not focused on what is happening around them. Instead, the DMN is especially active when a person is engaged in introspective activities (e.g., daydreaming, or contemplating the past or future). Research suggests that the DMN is disrupted in people with Mild Cognitive Impairment (MCI) and Alzheimer's disease (AD). Functional connectivity can be defined as the similarity between brain signals that arise from two anatomically separated brain regions. Similarity between the brain signals can be analyzed using Pearson's correlation. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Change in Auditory Memory scores | Change from baseline to 1 week post-treatment. | The stories subtest of the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) will be used to assess auditory memory. Raw scores will be transformed to z-scores (with a mean of 0 and standard deviation of 1) for each test score of interest across all participants. Thus the sample mean (across all arms) is zero for each test score. The z-scores were then averaged to produce a composite scores. Higher scores are indicative of better performance. |
| Change in Attention/Executive Function Cognitive Domain Scores | Change from baseline to 1-week post-treatment. | Neuropsychological tests will included the following domains: Attention/Executive Function (Trail Making Test A and B, Stroop Interference \[Golden version\]) Raw scores will be transformed to z-scores (with a mean of 0 and standard deviation of 1) for each test score of interest across all participants. Thus the sample mean (across all arms) is zero for each test score. The z-scores will be averaged to produce composite scores. Higher scores are indicative of better performance. |
| Change in Verbal Fluency scores | Change from baseline to 1-week post-treatment. | Controlled Oral Word Association test (FAS). Raw scores will be transformed to z-scores (with a mean of 0 and standard deviation of 1) for each test score of interest across all participants. Thus the sample mean (across all arms) is zero for each test score. Higher scores are indicative of better performance. |
| Change in Processing Speed Scores | Change from baseline to 1-week post-treatment. | Processing speed will be assessed with the coding subtest of RBANS as well as the Digit Symbol Substitution Test (DSST). Raw scores will be transformed to z-scores (with a mean of 0 and standard deviation of 1) for each test score of interest across all participants. Thus the sample mean (across all arms) is zero for each test score. The z-scores will be averaged to produce composite scores. Higher scores are indicative of better performance. |
| Change in Mobility | Change from baseline to 1-week post-treatment. | Mobility will be assessed with the Timed Up and Go (TUG) test, which assesses the time it takes participants to stand up from a chair, walk 3 meters, turn around, walk back to the chair and sit down. In addition, we will assess steady-state gait during 90 seconds of continuous over-ground walking at normal preferred speed, with and without the addition of a dual task challenge (counting backward by one or by two). |
| Change in Salience Network functional connectivity | Change from baseline to 1-week post-treatment. | The Salience Network consists of a network of brain regions whose cortical hubs are the anterior cingulate and ventral anterior insular (i.e., frontoinsular) cortices. This network also includes nodes in the amygdala, hypothalamus, ventral striatum, thalamus, and specific brainstem nuclei. |
| Change in Language Network functional connectivity | Change from baseline to 1-week post-treatment. | The Language Network consists of a group of left-lateralized frontal and temporal brain regions that responds to written/spoken/signed words and sentences, but not to mental arithmetic, music perception, executive function tasks, or action/gesture perception. |
Countries
United States
Contacts
PRINCIPAL_INVESTIGATORLinda L Chao, PhD
University of California, San Francisco & SFVAHCS
Outcome results
None listed