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Trial registered on ANZCTR
Registration number
ACTRN12610000573055
Ethics application status
Approved
Date submitted
14/07/2010
Date registered
16/07/2010
Date last updated
16/07/2010
Type of registration
Retrospectively registered
Titles & IDs
Public title
Australian Adolescent Type 1 Diabetes Intervention Trial (Aussie AdDIT) - to assess the prevalence and progression of microvascular and macrovascular disease in adolescents with Type-1 diabetes.
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Scientific title
Aussie AdDIT - to assess retinal vascular changes, atherosclerosis and neuropathy in an identified sample of adolescents with Type 1 Diabetes Mellitus (T1DM) at low and high risk of microalbuminuria.
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Secondary ID [1]
251992
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Nil
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Universal Trial Number (UTN)
U1111-1115-4841
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Trial acronym
Australian Adolescent Type 1 Diabetes Intervention Trial (Aussie AdDIT)
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Type-1 diabetes
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Condition category
Condition code
Metabolic and Endocrine
257714
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0
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Diabetes
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Intervention/exposure
Study type
Observational
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Patient registry
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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
No intervention - observational study of T1DM in adolescents for a period of 4 years.
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Intervention code [1]
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Not applicable
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Comparator / control treatment
Not applicable
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Control group
Uncontrolled
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Outcomes
Primary outcome [1]
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To assess the prevalence and progression of microvascular and macrovascular disease where outcome measures include retinopathy (as assessed through retinal photography), aortic intima medial thickness (as assessed through ultrasound technique)and heart rate variability (as assessed through electrocardiogram (ECG).
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Assessment method [1]
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Timepoint [1]
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Baseline and annually for 4 years
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Secondary outcome [1]
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To assess the rate of progression of atherosclerosis and neuropathy in participants undergoing angiotensin-converting enzyme (ACE) inhibitor and statin treatment. Assessments include retinopathy (by retinal photography), aortic intima medial thickness (by ultrasound technique)and heart rate variability (by electrocardiogram (ECG).
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Assessment method [1]
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Timepoint [1]
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Baseline and annually for 4 years
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Eligibility
Key inclusion criteria
1. Aged 11-16 years
2. Type 1 diabetes for more than one year or C–peptide negative
3. Assessment of albumin-creatinine ratio in the upper or lower tertile
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Minimum age
11
Years
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Maximum age
16
Years
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Sex
Both males and females
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Can healthy volunteers participate?
No
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Key exclusion criteria
1. Albumin-creatinine ratio based on 6 early morning urines deemed to be in the middle tertile.
2. Non-type 1 diabetes
3. Severe hyperlipidaemia and family history data to support diagnosis of hyperlipidaemia.
4. Established hypertension unrelated to diabetic nephropathy
5. Prior exposure to statins and ACE inhibitors
6. Proliferative retinopathy
7. Other co-morbidities considered unsuitable by the investigator
8. Renal disease not associated with type 1 diabetes
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Study design
Purpose
Natural history
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Duration
Longitudinal
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Selection
Defined population
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Timing
Prospective
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Statistical methods / analysis
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Recruitment
Recruitment status
Recruiting
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Date of first participant enrolment
Anticipated
5/05/2009
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Actual
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Date of last participant enrolment
Anticipated
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Actual
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Date of last data collection
Anticipated
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Actual
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Sample size
Target
530
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
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Recruitment postcode(s) [1]
3041
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6008
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Recruitment postcode(s) [2]
3042
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3052
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Recruitment postcode(s) [3]
3043
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5006
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Recruitment postcode(s) [4]
3044
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2145
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Recruitment postcode(s) [5]
3045
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4101
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Funding & Sponsors
Funding source category [1]
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Government body
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Name [1]
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National Health and Medical Research Council
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Address [1]
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Level 1
16 Marcus Clarke Street
Canberra ACT 2601
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Country [1]
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Australia
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Primary sponsor type
Individual
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Name
A/Professor Kim Donaghue
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Address
Institute of Endocrinology and Diabetes
The Children's Hospital at Westmead
Locked Bag 4001
Westmead NSW 2145
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Country
Australia
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Secondary sponsor category [1]
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None
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Name [1]
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Address [1]
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Country [1]
256385
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
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Women's and Children's Hospital Ethics Committee
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Ethics committee address [1]
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Women's and Children's Hospital, 72 King street, North adelaide, SA 5006
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Ethics committee country [1]
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Australia
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Date submitted for ethics approval [1]
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17/11/2008
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Approval date [1]
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10/12/2008
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Ethics approval number [1]
259316
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Summary
Brief summary
The prognosis for childhood onset type 1 diabetes (T1D) remains generally poor with the number of life years lost is 17 years for a child diagnosed aged 10 years. Whilst in the second decade from diagnosis diabetic nephropathy (DN)accounts for around 60% of deaths, by the third decade cardiovascular disease (CVD) accounts for two thirds of all deaths. Although complications are rarely seen during childhood, there is evidence that their pathogenesis begins soon after diagnosis and accelerates during puberty. Adolescence may be a critical period for lifetime risk of complications in childhood onset diabetes. During puberty, the first signs of complications become evident. Microalbuminuria, an early risk marker for DN and CVD may be found in 12 to 16% of adolescents and this has been associated with renal pathology indicative of early nephropathy. This study is investigating the changes in retinopathy, aortic intima media thickness (aIMT) and heart rate variability which are indicators of macrovascular disease and autonomic neuropathy respectively. Diabetic retinopathy is the most common cause of blindness in young adults less than 40 years in the developed world. Factors affecting the genesis of autonomic neuropathy include glycaemic control, lipids and blood pressure. Studies have shown that atherosclerosis develops first in the abdominal aorta and precedes that seen in the carotid arteries. A study has reported that both high blood pressure and lipids increase neuropathy risk and it is likely therefore that intervention with ACE inhibitors and / or statin impact on neuropathy progression. Specific aims: a. To assess retinopathy (by retinal photography), atherosclerosis ( by aortic intima media thickness and carotid intima media thickness) and neuropathy (by heart rate variability) in an identified sample of adolescents with T1DM at high risk of microalbuminuria as compared to adolescents with T1DM at low risk of microalbuminuria. b. To determine whether ACE inhibition/statin therapy during puberty will reduce retinopathy, atherosclerosis and autonomic neuropathy progression in adolescents with T1DM at high risk of Microalbuminuria compared to adolescents with T1DM at low risk of Microalbuminuria.
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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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Address
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Country
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Phone
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Fax
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Email
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Contact person for public queries
Name
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Dr Barbara Sheil
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Address
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Telethon Institute for Child Health,
100 Roberts Road, Subiaco,
Western Australia, 6008
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Country
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Australia
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Phone
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+61 8 9340 7858
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Fax
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Email
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[email protected]
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Contact person for scientific queries
Name
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Dr Barbara Sheil
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Address
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Telethon Institute for Child Health,
100 Roberts Road, Subiaco,
Western Australia, 6008
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Country
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Australia
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Phone
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+61 8 9340 7858
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Fax
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Email
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[email protected]
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No information has been provided regarding IPD availability
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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