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Trial registered on ANZCTR
Registration number
ACTRN12624000819527
Ethics application status
Approved
Date submitted
14/05/2024
Date registered
3/07/2024
Date last updated
3/07/2024
Date data sharing statement initially provided
3/07/2024
Type of registration
Retrospectively registered
Titles & IDs
Public title
Administrative intervention to support testing after gestational diabetes and hypertensive disorders in pregnancy
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Scientific title
POST-IT: A randomised controlled trial to evaluate a POSTpartum Intervention to support adherence to recommended Testing in women diagnosed with gestational diabetes and hypertensive disorders
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Secondary ID [1]
311991
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None
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Universal Trial Number (UTN)
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Trial acronym
POST-IT
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Gestational diabetes mellitus
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Hypertensive disorder in pregnancy
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Condition category
Condition code
Reproductive Health and Childbirth
330290
330290
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0
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Fetal medicine and complications of pregnancy
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Metabolic and Endocrine
330567
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0
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Diabetes
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Cardiovascular
330568
330568
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0
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Hypertension
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
The intervention consists of personalised administrative assistance to attend the recommended postpartum 6-week GP review and undergo recommended postpartum testing after gestational diabetes (GDM) and hypertensive disorders of pregnancy (HDP) in keeping with current recommendations.
This will include:
1. Booking the appointment with the participant's GP at a day and time of their choosing
2. Provision of pathology forms for oral glucose tolerance test (OGTT) (if GDM); and for 24 hour blood pressure monitor, urinary protein:creatinine ratio and blood tests for fasting lipids and glucose (if HDP).
4. Booking of OGTT (if GDM) at pathology centre of participant's choice at 12 weeks postpartum.
The participant will be provided with a single page summary of the appointments.
The personalised administrative assistance is provided by the PhD student investigator on the study team. This is provided either at or after 36 weeks for those recruited antenatally, and within one week postpartum for those recruited postpartum.
Fidelity to the intervention will be assessed primarily at the four month survey for all participants. A subset will also undergo validation by correspondence with the participant's GP, for those who provide consent to do so during the participant recruitment and consent process.
Validation involves the following: no active participation from participants. Contact with consenting participants' primary care practitioner will be performed for this subset, and data on a. whether a six week visit was performed; b. whether an OGTT or other diabetes screening test has been performed postpartum, and when (for those with GDM); and c. whether additional testing after hypertensive disorder in pregnancy has been performed, and which tests these are.
The timing of this subset validation will be: six months postpartum, i.e. two months following the participant's four month survey.
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Intervention code [1]
328452
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Behaviour
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Intervention code [2]
328502
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Early detection / Screening
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Comparator / control treatment
Control - standard of care
Standard of care is defined as care provided by the usual medical and obstetric team in keeping with usual practice. This predominantly includes written information on a discharge summary advising women of their recommended follow up with their GP and recommended postpartum testing, but does not include assistance beyond this.
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Control group
Active
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Outcomes
Primary outcome [1]
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Uptake of recommended postpartum testing (OGTT, recommended testing for HDP)
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Assessment method [1]
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Postpartum survey at four months postpartum, with self-reporting of uptake of recommended testing by participants. A subgroup will also undergo further validation through correspondence with their GP.
This survey has been designed specifically for this study.
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Timepoint [1]
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4 months post-delivery.
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Secondary outcome [1]
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1. Attendance at six week check
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Assessment method [1]
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Postpartum survey at four months postpartum, with self-reporting of uptake of recommended testing by participants. A subgroup will also undergo further validation through correspondence with their GP.
This survey has been designed specifically for this survey.
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Timepoint [1]
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4 months post-delivery
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Secondary outcome [2]
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2. Comparison of uptake of postpartum care between groups with GDP and HDP
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Assessment method [2]
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Postpartum survey at four months postpartum, with self-reporting of uptake of recommended testing by participants. A subgroup will also undergo further validation through correspondence with their GP.
This survey has been designed specifically for this survey.
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Timepoint [2]
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Four months post-delivery
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Secondary outcome [3]
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3. Attitudes towards intervention among participants in intervention arm
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Assessment method [3]
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Short survey designed specifically for this study
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Timepoint [3]
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Four months post-delivery
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Secondary outcome [4]
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4. Recollection of being asked about mental health during postpartum visit
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Assessment method [4]
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Survey question designed specifically for this study
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Timepoint [4]
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Four months post-delivery
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Eligibility
Key inclusion criteria
Planning to receive all antenatal care at site of study recruitment
Diagnosed with HDP or GDM at any point during pregnancy
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Minimum age
18
Years
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Maximum age
55
Years
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Sex
Females
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Can healthy volunteers participate?
No
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Key exclusion criteria
Aged <18 years
Past history of hypertension, Type 1 or Type 2 diabetes or Mature Onset Diabetes of the Young (MODY) that predates current pregnancy and for which they receive long term healthcare follow up
Diagnosis of severe GDM or HDP with activation of alternative specialist postpartum pathways: endocrinologist (GDM with complex management needs or concern for pre-existing Type 1 diabetes or MODY); or nephrologist (severe pre-eclampsia, eclampsia, or Haemolysis/Elevated Liver enzymes/Low platelets HELLP syndrome).
Residence interstate/overseas and planning to complete postpartum care outside of Victoria.
Women who have had a fetal death in utero or stillbirth; if already recruited, then they will automatically be withdrawn from the study.
Women who have complex medical or psychiatric needs in the peripartum period requiring extended stay (> two weeks, or > one week in Intensive Care Unit) postpartum; or otherwise deemed unsuitable at the discretion of the researcher/clinician.
Women who are incarcerated, who do not speak English and there is no interpreter available to obtain consent
Women who give birth prior to 32 weeks where an alternate postpartum pathway is in situ for follow-up
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Study design
Purpose of the study
Diagnosis
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Allocation to intervention
Randomised controlled trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Allocation concealment in place: randomisation not performed until after recruitment, performed by central randomisation.
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Simple randomisation using computer software (using atmospheric noise to generate true random number generation)
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Masking / blinding
Open (masking not used)
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Who is / are masked / blinded?
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Intervention assignment
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Other design features
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Phase
Not Applicable
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Type of endpoint/s
Efficacy
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Statistical methods / analysis
A study sample size of 72 per group (144 total) is required to detect a difference with 80% power and an alpha cut-off of 5%. This is based on an estimate of 2000 women being eligible over 12 months, using a baseline rate of attendance for postpartum testing of 50%, and to identify a difference between a control and intervention group, and a minimal detection effect of 20%.
The proportion of women who undergo recommended postpartum testing, will be compared between those randomised to the intervention, and those randomized to control. Other factors included in the analysis will include maternal age, parity, site of delivery, level of education, shared care versus hospital-based care, region of birth, English-speaking/not, and co-existence of GDM and HIP.
The proportions of those who complete recommended postpartum testing will be compared between the control and intervention group using the Chi square test. Logistic regression will be used to determine if undergoing the intervention is superior to no intervention for the study outcomes of attendance at the six week check and completion of recommended postpartum tests, when co-existing factors are taken into account. Unadjusted and adjusted odds ratios and their 95% confidence intervals will be reported.
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Recruitment
Recruitment status
Recruiting
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Date of first participant enrolment
Anticipated
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Actual
21/12/2023
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Date of last participant enrolment
Anticipated
31/12/2024
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Actual
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Date of last data collection
Anticipated
30/06/2025
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Actual
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Sample size
Target
144
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Accrual to date
66
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Final
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Recruitment in Australia
Recruitment state(s)
VIC
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Recruitment hospital [1]
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Monash Medical Centre - Clayton campus - Clayton
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Recruitment hospital [2]
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Casey Hospital - Berwick
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Recruitment hospital [3]
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Dandenong Hospital- Monash Health - Dandenong
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Recruitment postcode(s) [1]
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3168 - Clayton
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Recruitment postcode(s) [2]
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3806 - Berwick
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Recruitment postcode(s) [3]
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3175 - Dandenong
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Funding & Sponsors
Funding source category [1]
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Hospital
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Name [1]
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Monash Health
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Address [1]
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Country [1]
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Australia
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Primary sponsor type
Individual
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Name
Prof Michelle Giles, Department of Obstetrics, Monash Health, 246 Clayton Road, Melbourne, Vic 3168
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Address
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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]
318521
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Country [1]
318521
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
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Monash Health Human Research Ethics Committee A
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Ethics committee address [1]
315149
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https://monashhealth.org/research/resources/resource-library/
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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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20/09/2023
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Approval date [1]
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04/12/2023
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Ethics approval number [1]
315149
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Summary
Brief summary
Women who have a diagnosis of gestational diabetes or hypertension in pregnancy are recommended to have further testing postpartum to review their longer term health risks; however, many women do not undergo testing in a timely manner due to many competing priorities. This study is evaluating whether an intervention providing administrative assistance can improve attendance and testing in the post partum period. Participants in the POST-IT study are randomly allocated to receive standard of care (usual advice with no administrative assistance) or intervention (assistance to book GP visit and recommended testing after GDM or HDP). Attendance rates, uptake of testing, and acceptability of the intervention will be evaluated at four months' postpartum via telephone survey.
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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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Prof Michelle Giles
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Address
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Department of Obstetrics, Monash Health, 246 Clayton Road, Melbourne, Vic 3168
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Country
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Australia
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Phone
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+61 0395944564
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Fax
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Email
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[email protected]
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Contact person for public queries
Name
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Dr Naomi Whyler
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Address
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Department of Obstetrics, Monash Health, 246 Clayton Road, Melbourne, Vic 3168
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Country
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Australia
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Phone
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+61 0395944564
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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 Naomi Whyler
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Address
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Department of Obstetrics, Monash Health, 246 Clayton Road, Melbourne, Vic 3168
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Country
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Australia
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Phone
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+61 0395944564
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Fax
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Email
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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
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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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