- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02926820
Working Memory Training in Huntington's Disease
October 7, 2016 updated by: Christine Till, York University
Working Memory Training in Individuals With Huntington's Disease: A Pilot Project
There is a paucity of investigation into effective interventions to enhance cognitive function and/or mitigate cognitive decline in individuals with Huntington disease (HD).
This study targeted working memory (WM), which is the ability to actively hold information in the mind in order to perform complex mental tasks, given reports of WM dysfunction in patients with HD.
The investigators examined the feasibility of conducting a 5-week WM training program (Cogmed).
Patient adherence and treatment tolerance were assessed.
In addition, preliminary evidence for the efficacy of this training program on targeted cognitive abilities was examined.
Nine patients with pre-manifest or early stage HD underwent training.
Patients were assessed before the intervention and one week after completion.
Study Overview
Detailed Description
Huntington disease (HD) is associated with a variety of cognitive deficits, with prominent difficulties in working memory (WM).
WM deficits are notably compromised in early-onset and prodromal HD patients.
This study aimed to determine the feasibility of a computer-ized WM training program (Cogmed QM), novel to the HD population.
Nine patients, aged 26-62, with early stage HD underwent a 25-session (5 days/week for 5 weeks) WM training program (Cogmed QM).
Training exercises involved the manipulation and storage of verbal and visuospatial information, with difficulty adapted as a function of individual performance.
Neuropsychological testing was conducted before and after training, and performance on criterion WM measures (Digit Span and Spatial Span) and near-transfer WM measures (Symbol Span and Auditory WM) were evaluated.
Post-training inter-views about patient experience were thematically analyzed using NVivo software.
Seven of nine patients demonstrated adherence to the training and completed all sessions within the recommended timeframe of 5 weeks.
All adherent patients reported that they found training helpful (n=7), and almost all felt that their memory improved (n=6).
Compared to baseline scores, patients showed significant improvement on the neuropsychological measures of verbal WM, including Digit Span (p = .047)
and Auditory WM (p = .041).
This pilot study provides support for feasibility of computerized WM training in early-stage patients with HD. Results suggest that HD patients can improve WM with intensive training, though a full-scale intervention project is needed to understand the reliability of changes over time.
Study Type
Interventional
Enrollment (Actual)
9
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
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Ontario
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Toronto, Ontario, Canada, M2K 1E1
- North York General Hospital
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
20 years to 65 years (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Laboratory-confirmed gene expansion of at least 36 CAG repeats
- Reported working memory difficulties on the Patient-Reported Outcomes in Cognitive Impairment (PROCOG) questionnaire
- Total Functional Capacity (TFC) score of at least 3, taken from the UHDRS
- Montreal Cognitive Assessment (MOCA) score of 19 or greater
Exclusion Criteria:
- History of head trauma/neurological event such as stroke
- Untreated psychiatric symptoms or substance abuse
- Visual or motor symptoms that would impede ability to complete the program and/or neuropsychological testing
- Nonfluency in English
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Cognitive training
Participants will undergo five weeks of cognitive training using the Cogmed QM program.
All patients complete the same intervention.
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The intervention consisted of 25 Cogmed sessions, typically completed over a five week period (i.e. 5 days per week), with each session lasting between 40-50 minutes per day.
The program consists of 12 exercises that target visuo-spatial or verbal working memory.
At each training session, participants completed 8 of the 12 exercises (order selected by the user), with 15 trials per exercise.
Cogmed QM is an adaptive program, wherein task difficulty is adjusted to performance on each trial.
The level of difficulty adjusts continuously and automatically, ensuring that each session provides an engaging, challenging level of WM capacity.
Breaks were permitted, and encouraged, at the participants' discretion throughout the session.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Adherence to training (defined by completing the intervention within the recommended time frame)
Time Frame: 40 days
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Adherence was defined as completion of at least 80% of the total 25 training sessions within 40 calendar days or less
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40 days
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Digit Span subtest from the Wechsler Memory Scales - third edition
Time Frame: Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
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This test is used as a criterion measure (i.e.
measure that closely resembles tasks in the Cogmed program).
Scores will be reported in raw score units as the total correct responses.
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Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
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Spatial Span subtest from the Wechsler Memory Scales - third edition
Time Frame: Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
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This test is used as a criterion measure (i.e.
measure that closely resembles tasks in the Cogmed program).
Scores will be reported in raw score units as the total correct responses.
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Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
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Auditory Working Memory from the Woodcock Johnson Tests of Cognitive Ability - third edition
Time Frame: Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
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This test is used as a near transfer measure (i.e.
test of verbal or visuospatial working memory that include stimuli that are similar to trained tasks).
Scores will be reported in raw score units (total correct responses)
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Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
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Symbol span subtest from the Wechsler Memory Scales - fourth edition, reported in raw score units (total correct responses)
Time Frame: Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
|
This test is used as a near transfer measure (i.e.
test of verbal or visuospatial working memory that include stimuli that are similar to trained tasks).
Scores will be reported in raw score units (total correct responses)
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Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
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Verbal Fluency subtest from the Delis-Kaplan Executive Function System
Time Frame: Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
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This tests is used as a control task (i.e tests that do not directly assess working memory).
Score will be reported in raw score units (total words produced)
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Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
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Symbol Digits Modalities Test (oral administration)
Time Frame: Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
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This tests is used as a control task (i.e tests that do not directly assess working memory).
Score will be reported in raw score units (total words produced)
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Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
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Word List Learning from the Hopkins Verbal Learning Test -Revised
Time Frame: Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
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This tests is used as a control task (i.e tests that do not directly assess working memory).
Score will be reported in raw score units (total words learned)
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Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
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Trail Making Test - Parts A and B
Time Frame: Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
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This tests is used as a control task (i.e tests that do not directly assess working memory).
Score will be reported in raw score units (total time in seconds)
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Baseline (time 0) versus Post-intervention test score (up to 45 days post-baseline)
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Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Qualitative experiences of training program as reported by the patient
Time Frame: Post-interview follow-up, up to 45 days following baseline visit
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Keywords were used to elicit themes that were indicative of participant attitude and motivation for training
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Post-interview follow-up, up to 45 days following baseline visit
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Tolerance (ratio of training time to breaks per day)
Time Frame: Per session and through completion of training program, up to 40 days
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To assess tolerance, the ratio of active training time to breaks per day was examined (Cogmed guidelines suggest at most a 2:1 ratio of active training time and breaks per sessions).
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Per session and through completion of training program, up to 40 days
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Cogmed Improvement Index
Time Frame: Through completion of training program, up to 40 days
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The Improvement Index represents average improvement over the course of the training.
It is calculated automatically by the program by subtracting the Start Index (score on third day of training) from the Max Index (best score throughout training).
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Through completion of training program, up to 40 days
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Collaborators
Investigators
- Principal Investigator: Christine Till, PhD, York University
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
February 1, 2015
Primary Completion (Actual)
March 1, 2016
Study Completion (Actual)
March 1, 2016
Study Registration Dates
First Submitted
September 30, 2016
First Submitted That Met QC Criteria
October 4, 2016
First Posted (Estimate)
October 6, 2016
Study Record Updates
Last Update Posted (Estimate)
October 10, 2016
Last Update Submitted That Met QC Criteria
October 7, 2016
Last Verified
October 1, 2016
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Mental Disorders
- Brain Diseases
- Central Nervous System Diseases
- Nervous System Diseases
- Neurocognitive Disorders
- Genetic Diseases, Inborn
- Basal Ganglia Diseases
- Movement Disorders
- Neurodegenerative Diseases
- Dyskinesias
- Heredodegenerative Disorders, Nervous System
- Dementia
- Cognition Disorders
- Chorea
- Huntington Disease
Other Study ID Numbers
- NYGH 15-0001
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
No
Study Data/Documents
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Study Protocol
Information comments: The lead investigator, Dr. Christine Till, can be contacted by email (ctill@yorku.ca) for a copy of the Informed Consent Form or study protocol.
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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