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Trial registered on ANZCTR
Registration number
ACTRN12618000618257
Ethics application status
Approved
Date submitted
13/04/2018
Date registered
20/04/2018
Date last updated
6/05/2021
Date data sharing statement initially provided
6/05/2021
Date results information initially provided
6/05/2021
Type of registration
Retrospectively registered
Titles & IDs
Public title
Amyloid deposition and cognitive function in Obstructive Sleep Apnoea
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Scientific title
.Amyloid deposition and cognitive function in Obstructive Sleep Apnoea
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Secondary ID [1]
294526
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Nil known
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Universal Trial Number (UTN)
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Trial acronym
ADiOSA
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Obstructive Sleep Apnoea
307297
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Condition category
Condition code
Respiratory
306414
306414
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0
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Sleep apnoea
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Intervention/exposure
Study type
Observational
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Patient registry
False
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Target follow-up duration
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Target follow-up type
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Description of intervention(s) / exposure
The study group is individuals with moderate to severe obstructive sleep apnoea.
Participants attend 1 x 2.5-hour face-to-face cognitive testing session that is run by a Research Assistant with experience in administering the testing materials . Participants are asked to complete a number of self-report questionnaires and cognitive/mood assessment tasks. Participants undergo 1x 18-F-NAV4694 PET scan to observe the amount of amyloid in the brain. An introvenous line will be inserted into a vein of the arm for the injection of the imaging agent. Participants will rest for 50 minutes and then be positioned lying down with their head in the PET scanner. A 20-minute image will be acquired starting at 50 minutes post injection of the 18F-NAV4694.
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Intervention code [1]
300853
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Early Detection / Screening
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Comparator / control treatment
Health individuals with no sleep disorder, age and gender matched.
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Control group
Active
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Outcomes
Primary outcome [1]
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Degree of brain beta-amyloid burden as assessed by Positron Emission Tomography imaging.
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Assessment method [1]
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Timepoint [1]
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Baseline
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Secondary outcome [1]
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Level of daytime sleepiness assessed using the Epworth Sleepiness Scale (ESS)
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Assessment method [1]
345304
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Timepoint [1]
345304
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Baseline
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Secondary outcome [2]
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Cognitive function and mood measured using Mini Mental State Examination
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Assessment method [2]
345305
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Timepoint [2]
345305
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Baseline
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Secondary outcome [3]
345306
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Severity of Obstructive Sleep Apnoea (OSA) assessed by Apnoea Hypopnea Index (AHI) result from Sleep Study
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Assessment method [3]
345306
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Timepoint [3]
345306
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Screening
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Secondary outcome [4]
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Cognitive function and mood measured using Delis-Kaplan Executive Function System
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Assessment method [4]
345673
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Timepoint [4]
345673
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Baseline
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Secondary outcome [5]
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Cognitive function and mood measured using Wechsler Test of Adult Reading
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Assessment method [5]
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Timepoint [5]
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Baseline
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Secondary outcome [6]
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Cognitive function and mood measured using WAIS Digit Span
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Assessment method [6]
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Timepoint [6]
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Baseline
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Secondary outcome [7]
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Cognitive function and mood measured using Digit Symbol Coding
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Assessment method [7]
345676
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Timepoint [7]
345676
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Baseline
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Secondary outcome [8]
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Cognitive function and mood measured using Wechsler Memory Scale - Fourth Edition (WMS-IV) Logical Memory Task
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Assessment method [8]
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Timepoint [8]
345677
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Baseline
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Secondary outcome [9]
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Cognitive function and mood measured using Autobiographical Memory Test
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Assessment method [9]
345678
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Timepoint [9]
345678
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Baseline
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Secondary outcome [10]
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Cognitive function and mood measured using Rey Complex Figure Test
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Assessment method [10]
345679
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Timepoint [10]
345679
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Baseline
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Secondary outcome [11]
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Cognitive function and mood measured using Cogstate Battery
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Assessment method [11]
345680
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Timepoint [11]
345680
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Baseline
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Secondary outcome [12]
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Cognitive function and mood measured using Hospital Anxiety and Depression Scale
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Assessment method [12]
345681
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Timepoint [12]
345681
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Baseline
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Secondary outcome [13]
345682
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Cognitive function and mood measured using Subtle Cognitive Impairment Test
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Assessment method [13]
345682
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Timepoint [13]
345682
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Baseline
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Secondary outcome [14]
345683
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Cognitive function and mood measured using Trail Making Test
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Assessment method [14]
345683
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Timepoint [14]
345683
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Baseline
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Secondary outcome [15]
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Cognitive function and mood measured using Samn-Perelli Fatigue Scale
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Assessment method [15]
345684
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Timepoint [15]
345684
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Baseline
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Secondary outcome [16]
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Cognitive function and mood measured using Geriatric Depression Scale
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Assessment method [16]
345685
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Timepoint [16]
345685
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Baseline
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Secondary outcome [17]
345686
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Cognitive function and mood measured using Autobiographical Memory Interview
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Assessment method [17]
345686
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Timepoint [17]
345686
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Baseline
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Eligibility
Key inclusion criteria
Aged 50-75 years; OSA diagnosis (AHI>15 events/hr); are OSA treatment-naïve; sufficient English to undertake cognitive testing; able to provide informed consent.
Healthy controls will be age- and gender-matched to the OSA group. The will be required to have sufficient English to undertake cognitive testing; able to provide informed consent; must have no sleep disorder (AHI <5 events/hr).
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Minimum age
50
Years
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Maximum age
75
Years
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Sex
Both males and females
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Can healthy volunteers participate?
Yes
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Key exclusion criteria
Active medical or psychiatric condition that may interfere with study procedures; or a previous diagnosis of dementia; pregnancy.
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Study design
Purpose
Screening
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Duration
Cross-sectional
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Selection
Defined population
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Timing
Prospective
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Statistical methods / analysis
Statistical analysis will be in the form of independent samples t-tests comparing overall amyloid burden and cognitive function between of the OSA patients and healthy controls. Regression analyses will be conducted to between clinical outcomes (cognition, sleepiness, sleep variables, demographics) and amyloid burden.
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Recruitment
Recruitment status
Stopped early
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Data analysis
Data analysis is complete
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Reason for early stopping/withdrawal
Lack of funding/staff/facilities
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Date of first participant enrolment
Anticipated
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Actual
8/12/2016
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Date of last participant enrolment
Anticipated
1/04/2019
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Actual
12/12/2019
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Date of last data collection
Anticipated
28/06/2019
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Actual
18/12/2019
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Sample size
Target
70
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Accrual to date
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Final
46
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Recruitment in Australia
Recruitment state(s)
VIC
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Recruitment hospital [1]
10622
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Austin Health - Austin Hospital - Heidelberg
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Recruitment postcode(s) [1]
22339
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3084 - Heidelberg
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Funding & Sponsors
Funding source category [1]
299214
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Charities/Societies/Foundations
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Name [1]
299214
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Institute for Breathing and Sleep
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Address [1]
299214
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Bowen Centre, Austin Health
145 Studley Road
Heidelberg, Victoria, 3084
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Country [1]
299214
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Australia
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Funding source category [2]
299215
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Charities/Societies/Foundations
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Name [2]
299215
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Brain Foundation
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Address [2]
299215
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PO Box 579
Crows Nest NSW 1585
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Country [2]
299215
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Australia
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Funding source category [3]
299216
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Charities/Societies/Foundations
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Name [3]
299216
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Equity Trustee
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Address [3]
299216
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Level 1, 575 Bourke St
Melbourne
Vic 3000
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Country [3]
299216
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Australia
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Primary sponsor type
Charities/Societies/Foundations
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Name
Institute for Breathing and Sleep
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Address
Bowen Centre, Austin Hospital
145 Studley Road
Heidelberg, Victoria, 3084
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Country
Australia
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Secondary sponsor category [1]
298476
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None
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Name [1]
298476
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Address [1]
298476
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Country [1]
298476
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
300078
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Austin Health Human Research Ethics Committee
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Ethics committee address [1]
300078
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Austin Hospital
145 Studley Rd,
Heidelberg VIC 3084
PO Box 5555 Heidelberg
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Ethics committee country [1]
300078
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Australia
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Date submitted for ethics approval [1]
300078
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Approval date [1]
300078
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01/07/2016
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Ethics approval number [1]
300078
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Summary
Brief summary
Obstructive Sleep Apnoea (OSA) is a highly prevalent chronic illness, characterised by repetitive collapse of the airway during sleep, causing falls in blood oxygen levels and sleep disruption. OSA is associated with cognitive deficits, especially memory impairments. Another common condition, dementia, is in the top 4 causes of burden of disease of high-income nations. It affects over 340,000 Australians. OSA is common in patients with dementia, with estimates of 38-45% of dementia patients having OSA. The risk of Alzheimer’s disease and vascular dementia has been shown to increase in patients with OSA. However, a direct causal link between these two conditions has not been established.
Beta-amyloid deposits are commonly found in the brains of patients with dementia, and are implicated in the development of dementia. Positron emission tomography (PET) can be used to assess levels of amyloid in the brains of patients, and these levels can be associated with cognitive function. Previous studies performed at Austin Health have found significant associations between amyloid levels and memory impairment in patients with mild cognitive impairment. To date, no studies have examined whether OSA is associated with higher levels of beta amyloid deposits or Alzheimer’s disease -type neural changes, or how these changes relate to cognitive performance.
This study will use PET scanning techniques to examine the levels of amyloid in the brains of patients with OSA, and compare these to brain scans of healthy participants. This study will also conduct cognitive assessments in the OSA patients and healthy controls, examining associations between cognitive performance and amyloid levels.
Identifying potential biomarkers of amyloid burden in OSA could have important implications for early detection and risk assessment. Early identification of the risk of developing dementia in patients with OSA is important as it allows the possibility of a simple intervention that targets the sleep disorder that may be contributing towards the development of neural and cognitive impairment, before it progresses to dementia.
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Trial website
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Trial related presentations / publications
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Public notes
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Contacts
Principal investigator
Name
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Dr Melinda Jackson
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Address
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Turner Institute for Brain and Mental Health
Sleep and Circadian Rhythms
School of Psychological Sciences
Monash University
18 Innovation Walk, Clayton, VIC, 3800
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Country
82498
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Australia
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Phone
82498
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+61399050206
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Fax
82498
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Email
82498
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[email protected]
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Contact person for public queries
Name
82499
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Dr Marina Cavuoto
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Address
82499
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Institute for Breathing and Sleep, Austin Health
Level 5, Harold Stokes Building, Austin Hospital
PO Box 5555, Heidelberg, Victoria, 3084
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Country
82499
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Australia
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Phone
82499
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+613 9496 3517
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Fax
82499
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Email
82499
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[email protected]
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Contact person for scientific queries
Name
82500
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Dr Melinda Jackson
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Address
82500
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Turner Institute for Brain and Mental Health
Sleep and Circadian Rhythms
School of Psychological Sciences
Monash University
18 Innovation Walk, Clayton, VIC, 3800
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Country
82500
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Australia
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Phone
82500
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+61399050206
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Fax
82500
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Email
82500
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[email protected]
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Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
No
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No/undecided IPD sharing reason/comment
n/a
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What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
No additional documents have been identified.
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