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Trial registered on ANZCTR
Registration number
ACTRN12621001633875p
Ethics application status
Submitted, not yet approved
Date submitted
26/10/2021
Date registered
29/11/2021
Date last updated
2/06/2023
Date data sharing statement initially provided
29/11/2021
Type of registration
Prospectively registered
Titles & IDs
Public title
DeCaf-Me: Can delirium be prevented with caffeine and melatonin? A randomised, placebo-controlled trial
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Scientific title
DeCaf-Me: Can delirium be prevented with caffeine and melatonin? A randomised, placebo-controlled trial
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Secondary ID [1]
305657
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none
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Universal Trial Number (UTN)
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Trial acronym
DeCaf-Me
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Delirium
324125
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Post-operative pain
324359
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Vascular surgery
324360
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Spinal surgery
324361
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Condition category
Condition code
Neurological
321604
321604
0
0
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Other neurological disorders
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Anaesthesiology
321605
321605
0
0
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Pain management
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Surgery
321843
321843
0
0
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Other surgery
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Cardiovascular
321844
321844
0
0
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Other cardiovascular diseases
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
The study will have the following three intervention arms:
1) Oral 100 mg Caffeine (NoDoz) twice daily at 0700 and 1400 and oral Melatonin (circadian) 4mg once per day at 2000 on post operative days 1 and 2
2) Oral 100 mg Caffeine twice daily at 0700 and 1400 on post-operative days 1 and 2
3) Oral 4mg Melatonin once daily at 2000 on post-operative days 1 and 2
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Intervention code [1]
322052
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Treatment: Drugs
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Intervention code [2]
322227
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Prevention
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Comparator / control treatment
Control group =No Intervention
Stand post-operative care will continue including regular patient medications, analgesia, anti-emetics and medications to maintain haemodynamic stability as required. There are no restrictions/limitations to post-operative care and the treating medical team will provide ongoing post-operative care at their discretion and as per their standard care.
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Control group
Active
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Outcomes
Primary outcome [1]
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Delirium severity assessed using the Delirium Rating Scale- Revised- 98 (DRS-R-98)
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Assessment method [1]
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Timepoint [1]
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Assessed twice on post-operative day 1 (morning from 0600-1000 and afternoon 1400-1800)
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Primary outcome [2]
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Delirium severity assessed using Richmond Agitation and Sedation Scale (RASS)
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Assessment method [2]
329605
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Timepoint [2]
329605
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Assessed twice on post-operative day 1 (morning from 0600-1000 and afternoon from 1400-1800)
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Primary outcome [3]
329606
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Delirium severity assessed using the Confusion Assessment Method - Severity (CAM-S)
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Assessment method [3]
329606
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Timepoint [3]
329606
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Assessed twice on post-operative day 1 (morning from 0600-1000 and afternoon from 1400-1800)
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Secondary outcome [1]
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Instances and severity of post-operative delirium using DRS-R-98
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Assessment method [1]
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Timepoint [1]
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Assessed twice on post-operative days 1, 2 and 3 (morning assessment between 0600-1000 and afternoon between 1400-1800)
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Secondary outcome [2]
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Differences in Electrocephalogram (EEG) power from 0.5-6Hz
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Assessment method [2]
403150
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Timepoint [2]
403150
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Measured intra-operatively and on post-operative day 1
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Secondary outcome [3]
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Instance and severity of delirium assessed using 3D CAM-S
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Assessment method [3]
403151
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Timepoint [3]
403151
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Assessed twice daily on post-operative days 1, 2 and 3 (morning assessment between 0600-1000 and afternoon between 1400-1800)
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Secondary outcome [4]
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Changes in Richmond Agitation and Sedation Score (RASS)
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Assessment method [4]
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Timepoint [4]
403152
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Assessed twice daily on post-operative days 1-3 (morning assessment between 0600-1000 and afternoon between 1400-1800)
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Secondary outcome [5]
403153
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Post-operative pain scores using the visual analogue scale for pain as documented by nursing staff
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Assessment method [5]
403153
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Timepoint [5]
403153
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Assessed once daily on post-operative days 1-3 (average pain score will be calculated)
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Secondary outcome [6]
403156
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Safety of using post-operative caffeine and melatonin assessed through documentation of adverse events/serious adverse events (specifically cardiovascular arrhythmias or myocardial events)
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Assessment method [6]
403156
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Timepoint [6]
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Assessed on post-operative days 1-7 through review of electronic medical records/patient follow up
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Eligibility
Key inclusion criteria
Patients undergoing vascular or spinal surgery
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Minimum age
65
Years
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Maximum age
No limit
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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
Non-english speaking
Participants who may have received an investigational new drug within the last 7 days/weeks.
Participants with a history of a psychological illness or other conditions which may interfere with their ability to understand the study requirements such as preexisting dementia.
Participants with prior known intolerance/allergy to caffeine
Undergoing cardiac or intracranial neurosurgery
Known history of intolerance of caffeine or melatonin
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Study design
Purpose of the study
Prevention
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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)
Randomisation by computer- RedCap program supplied by SLHD
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Simple randomisation using a randomisation table created by computer software. As above through RedCap supplied by SLHD.
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Masking / blinding
Blinded (masking used)
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Who is / are masked / blinded?
The people assessing the outcomes
The people analysing the results/data
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Intervention assignment
Factorial
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Other design features
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Phase
Phase 3
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Type of endpoint/s
Safety/efficacy
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Statistical methods / analysis
This pilot study is powered for a 50% reduction in the mean severity of delirium (Delirium rating scale 98 of 12 vs. 6, standard deviation of 7), p<0.025 for two endpoints.
The primary outcome, the DRS-98 will be analyzed by Mann-Whitney or t-test depending on distribution.
The incidence of resolution of delirium (on 3D-CAM), will be analysed by Fischer’s exact test.
The RASS will be analyzed by Mann-Whitney or t-test depending on distribution.
EEG analysis will be conducted by pwelch calculation of power bands and Mann-Whitney or t-test depending on distribution.
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Recruitment
Recruitment status
Not yet recruiting
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Date of first participant enrolment
Anticipated
1/08/2023
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Actual
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Date of last participant enrolment
Anticipated
4/08/2025
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Actual
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Date of last data collection
Anticipated
3/08/2026
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Actual
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Sample size
Target
57
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
NSW
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Recruitment hospital [1]
20950
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Royal Prince Alfred Hospital - Camperdown
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Recruitment postcode(s) [1]
35767
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2050 - Camperdown
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Funding & Sponsors
Funding source category [1]
310016
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Hospital
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Name [1]
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Department of Anaesthetics- Royal Prince Alfred Hospital
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Address [1]
310016
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50 Missenden Road
Level 4, BLDG 89
Camperdown NSW 2050
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Country [1]
310016
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Australia
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Primary sponsor type
Hospital
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Name
Royal Prince Alfred Hospital
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Address
Royal Prince Alfred Hospital
50 Missenden Road
Camperdown NSW 2050
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Country
Australia
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Secondary sponsor category [1]
311080
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None
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Name [1]
311080
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Address [1]
311080
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Country [1]
311080
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Ethics approval
Ethics application status
Submitted, not yet approved
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Ethics committee name [1]
309723
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Sydney Local Health District (RPAH Zone)
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Ethics committee address [1]
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Sydney Local Health District
Level 11, KGV Building Missenden Road
CAMPERDOWN NSW 2050
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Ethics committee country [1]
309723
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Australia
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Date submitted for ethics approval [1]
309723
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23/11/2021
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Approval date [1]
309723
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Ethics approval number [1]
309723
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Summary
Brief summary
DeCaf-Me: Prevent Delirium with Caffeine or Melatonin is a open label cross over factorial randomised controlled trial that is aiming to recruit 57 spinal or vascular participants over the age of 65 at Royal Prince Alfred Hospital. Participants will be recruited via the Department of Anaesthetics in the pre-admission clinic. They will be assessed for eligibility and risk at this time, informed consent will be done pre-operatively.
Participants will be randomised to one of four arms - 1)100 mg caffeine at 7am and 2pm, 4 mg melatonin at 8pm, 2)100mg caffeine at 7am and 2pm, 3)4mg melatonin at 8pm or 4)no intervention.
Primary outcomes are incidence of post-operative delirium on day 1 and secondary outcomes are Richmond Agitation and Sedation Score, differences in EEG power from 0.5-0.6Hz, changes in incidence of delirium, post-operative pain and opioid use. Patients will be monitored intraoperatively via BIS monitoring/EEG and on post operative days 1-3 receive delirium assessments on the ward/ICU. Additionally an EEG will be preformed on post-operative day 1 and a 10mL blood sample will be collected for biomarker analysis during standard blood collection intra-operatively and on post-operative day 1. Participants will be finished on post-operative day 7 after completing a cognitive assessment in person or over the phone.
The rationale of this study is that the use of post-operative caffeine could have an effect on inflammation that could effect post-operative delirium severity and the consequential slowing of electroencephalogram readings. Additionally the use of caffeine and melatonin to help maintain circadian rhythms could help promote more restful sleep and reinforce normal sleep patterns which can reduce instances of post-operative delirium.
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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 Robert Sanders
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Address
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Department of Anaesthetics
Royal Prince Alfred Hospital
50 Missenden Road
Level 4, BLDG 89
Camperdown NSW 2050
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Country
115170
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Australia
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Phone
115170
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+61 02 9515 8564
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Fax
115170
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Email
115170
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[email protected]
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Contact person for public queries
Name
115171
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Miss Kaitlin Kramer
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Address
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Department of Anaesthetics
Royal Prince Alfred Hospital
50 Missenden Road
Level 4, BLDG 89
Camperdown NSW 2050
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Country
115171
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Australia
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Phone
115171
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+61 2 9515 8789
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Fax
115171
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Email
115171
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[email protected]
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Contact person for scientific queries
Name
115172
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Prof Robert Sanders
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Address
115172
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Department of Anaesthetics
Royal Prince Alfred Hospital
50 Missenden Road
Level 4, BLDG 89
Camperdown NSW 2050
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Country
115172
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Australia
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Phone
115172
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+61 02 9515 8564
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Fax
115172
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Email
115172
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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
Doc. No.
Type
Citation
Link
Email
Other Details
Attachment
13792
Study protocol
383028-(Uploaded-23-05-2022-11-06-53)-Study-related document.pdf
13793
Informed consent form
383028-(Uploaded-23-05-2022-11-07-33)-Study-related document.pdf
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.
Download to PDF