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Trial registered on ANZCTR

Registration number
Ethics application status
Date submitted
Date registered
Date last updated
Type of registration
Retrospectively registered

Titles & IDs
Public title
Combating dementia by cognitive enrichment
Scientific title
A randomized-controlled design to examine whether cognitive enrichment enhances the structure and function of the brain's default mode system in people showing mild cognitive impairment.
Secondary ID [1] 281339 0
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
dementia 287565 0
Alzheimer's disease 287566 0
mild cognitive impairment 287567 0
Condition category
Condition code
Neurological 287891 287891 0 0
Mental Health 287921 287921 0 0
Studies of normal psychology, cognitive function and behaviour

Study type
Description of intervention(s) / exposure
Cognitive enrichment: (a) 3 or 4 x 1 hour session per week for 24 weeks (3 or 4 based on participant choice / feasibility) and (b) provided at home through a combination of support person / significant other and research psychologists, with weekly visits and telephone support (minimum of one 5 min call every fortnight, up to 20 minutes if required or weekly if required).
Intervention code [1] 285805 0
Treatment: Other
Intervention code [2] 285833 0
Intervention code [3] 285834 0
Early detection / Screening
Comparator / control treatment
Wait-list control, offered intervention starting at 6 to 7 months after baseline assessments.
Control group

Primary outcome [1] 288105 0
Change to the default mode system: Primary outcome variables will be fMRI functional connectivity comparisons across resting state, working memory and Self-appraisal conditions.
Timepoint [1] 288105 0
Baseline vs 6 months
Secondary outcome [1] 299433 0
Cognitive improvement, based on (a) standardized neuropsychological tests covering the domains of "executive function, attention and working memory, visuospatial function, language, and episodic memory; (b) the ADAS-Cog and DRS-2 (c) experimental tasks (Attention Network Test, Ambiguous Patterns, and Structural Learning); and (d) autobiographical and Dodson source memory.
Timepoint [1] 299433 0
1. Baseline, 8-9 weeks, 17-18 weeks and 6 months for (a) a restricted set of the neuropsychological tests (story memory, Stroop, and Symbol Digit Modalities Test) , (c) experimental tasks (Attention Network Test, Ambiguous Patterns, and Structural Learning) and (d) source memory.
2. Baseline vs 6 months for (a) standardized neuropsychological tests covering the domains of "executive function, attention and working memory, visuospatial function, language, and episodic memory; (b) the ADAS-Cog and DRS-2; and (d) autobiographical memory (autobiographical memory interview at baseline, then more detailed Test Episodique du Memoire du Passe Autobiographique at 6 months).
Secondary outcome [2] 299434 0
Improved support person well-being: Zarit Burden Inventory, 12-item Health Status Questionnaire, Geriatric Depression Scale and Geriatric Anxiety Inventory.
Timepoint [2] 299434 0
baseline vs 6 months

Key inclusion criteria
mild cognitive impairment: two measures reaching 1.5 SD below age and education matched normative data within any of the the domains of "executive function, attention and working memory, visuospatial function, language, and episodic memory", and without significant impairment to everyday functional activities (Reisberg IADLS).
Minimum age
60 Years
Maximum age
85 Years
Both males and females
Can healthy volunteers participate?
Key exclusion criteria
dementia; current psychiatric or other medical condition affecting cognitive abilities; early developmental disorder

Study design
Purpose of the study
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Central randomization by computer. Participant ID used in randomized allocation. Inclusion in the trial made prior to randomization. Based on an earlier screen of 550 volunteers, baseline neuropsychological testing will identify 40 individuals meeting criteria for mild cognitive impairment. These will be advised that they will receive cognitive enrichment or be wait-listed to receive cognitive enrichment.
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Dynamic balanced randomization to treatment or wait-list control, based on gender, baseline cognition and age.
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?

Intervention assignment
Other design features
Those in the intervention arm may or may not continue at the end of the study period. Those in the wait-list arm given the opportunity to have intervention at the end of the study period.
Not Applicable
Type of endpoint(s)
Statistical methods / analysis

Recruitment status
Not yet recruiting
Date of first participant enrolment
Date of last participant enrolment
Date of last data collection
Sample size
Accrual to date
Recruitment outside Australia
Country [1] 4583 0
New Zealand
State/province [1] 4583 0

Funding & Sponsors
Funding source category [1] 286105 0
Government body
Name [1] 286105 0
Lottery Health NZ
Address [1] 286105 0
New Zealand Lottery Grants Board,
46 Waring Taylor Street,
PO Box 805
Wellington 6140
Country [1] 286105 0
New Zealand
Primary sponsor type
New Zealand Brain Research Institute
66 Stewart St.,
Christchurch 8011
New Zealand
Secondary sponsor category [1] 284917 0
Name [1] 284917 0
University of Canterbury
Address [1] 284917 0
Department of Psychology
Ilam Rd.,
Christchurch 8084
Country [1] 284917 0
New Zealand

Ethics approval
Ethics application status
Ethics committee name [1] 288152 0
Health and Disability Ethics Committees
Ethics committee address [1] 288152 0
1 the Terrace
PO Box 5013
Wellington 6145
Ethics committee country [1] 288152 0
New Zealand
Date submitted for ethics approval [1] 288152 0
Approval date [1] 288152 0
Ethics approval number [1] 288152 0

Brief summary
Cognitive training has been used to improve mental functions in people with early dementia and those with mild cognitive impairment, who are at risk of future dementia. This is potentially the first study however, to examine systematically varied cognitive training aimed at enhancing the functions of a brain system, called the default mode system, which malfunctions in people progressing to dementia. We anticipate that people given our cognitive enrichment will show benefits in the structure and function of this brain system, in addition to improved mental functions.
Trial website
Trial related presentations / publications
Public notes

Principal investigator
Name 34790 0
Address 34790 0
Country 34790 0
Phone 34790 0
Fax 34790 0
Email 34790 0
Contact person for public queries
Name 18037 0
Leslie Livingston
Address 18037 0
New Zealand Brain Research Institute
66 Stewart St.,
Christchurch 8011
Country 18037 0
New Zealand
Phone 18037 0
64 3 378 6257
Fax 18037 0
64 3 3786 299
Email 18037 0
Contact person for scientific queries
Name 8965 0
Assoc. Prof. John Dalrymple-Alford
Address 8965 0
New Zealand Brain Research Institute
66 Stewart St.,
Christchurch 8011
Country 8965 0
New Zealand
Phone 8965 0
64 3 378 6090
Fax 8965 0
64 3 3786 299
Email 8965 0

No information has been provided regarding IPD availability
Summary results
No Results