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Trial registered on ANZCTR
Registration number
ACTRN12624000960550
Ethics application status
Approved
Date submitted
2/04/2024
Date registered
7/08/2024
Date last updated
7/08/2024
Date data sharing statement initially provided
7/08/2024
Type of registration
Prospectively registered
Titles & IDs
Public title
ASAPP Pilot Trial: Efficacy of Azithromycin for Short cervix and Amniotic fluid sludge for the Prevention of Preterm birth
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Scientific title
ASAPP: Efficacy of Azithromycin for Short cervix and Amniotic fluid sludge for the Prevention of Preterm birth, a pilot randomised controlled trial
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Secondary ID [1]
311722
0
nil known
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Universal Trial Number (UTN)
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Trial acronym
ASAPP
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Preterm birth
333203
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Short Cervical Length
333204
0
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Intra-amniotic Infection
333205
0
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Amniotic fluid sludge
333206
0
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Pregnancy
333207
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Vaginal dysbiosis
333208
0
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Condition category
Condition code
Reproductive Health and Childbirth
329890
329890
0
0
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Fetal medicine and complications of pregnancy
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Reproductive Health and Childbirth
329891
329891
0
0
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Complications of newborn
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Reproductive Health and Childbirth
329892
329892
0
0
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Antenatal care
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Infection
329893
329893
0
0
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Studies of infection and infectious agents
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
The intervention in this pilot study is the use of oral Azithromycin tablets (6 x 250mg). Patients randomised to receive the investigational product will take two 250mg tablets on day one, followed by a 250mg tablet daily on days two-five. To monitor adherence to the intervention, participants will be asked to keep a medication diary and to bring their empty packaging or any unused tablets back to the research staff members.
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Intervention code [1]
328187
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Treatment: Drugs
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Comparator / control treatment
The control treatment in this study is the use of placebo according to 1:1 randomisation. Patients randomised to receive placebo will take two 250mg placebo tablets on day one followed by a 250mg placebo tablet daily on days two-five. Pharmacologically inactive placebo tablets will be manufactured in accordance with any applicable GMP. The exact composition will be determined by the supplier.
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Control group
Placebo
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Outcomes
Primary outcome [1]
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The primary outcome for this pilot study is the presence of amniotic fluid sludge (AFS) visible on ultrasound, 2 weeks after the course of the treatment.
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Assessment method [1]
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Transvaginal ultrasound. Assessment of AFS will be binary (either “present” or “absent”).
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Timepoint [1]
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Two weeks post-randomisation.
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Secondary outcome [1]
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Change in cervical length two weeks after randomisation and at 26+0 weeks’ gestation, relative to baseline.
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Assessment method [1]
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Measurements will be performed using ultrasonographic approach following a standardized protocol as outlined by the RANZCOG guideline "Measurement of cervical length for prediction of preterm birth". Cervical length will be reported as a continuous variable expressed in millimetres.
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Timepoint [1]
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Baseline, two weeks post-randomisation, 26+0 weeks’ gestation.
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Secondary outcome [2]
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Change in high vaginal swab (HVS): microscopy or culture and sensitivity (this will be assessed as a composite outcome).
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Assessment method [2]
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A HVS will be performed at baseline, two-weeks post-randomisation and at 26 weeks plus zero days’ gestation.
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Timepoint [2]
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Baseline, two-weeks post-randomisation, 26 weeks’ gestation.
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Secondary outcome [3]
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Maternal mortality.
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Assessment method [3]
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Medical assessment.
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Timepoint [3]
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Between time of randomisation and discharge from hospital following delivery.
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Secondary outcome [4]
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Maternal infection.
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Assessment method [4]
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Clinical or histological diagnosis of chorioamnionitis will be assessed as a composite outcome. Histological assessment will be performed locally if chorioamnionitis is suspected clinically. Data will be collected from hospital records.
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Timepoint [4]
432736
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Discharge from hospital following delivery.
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Secondary outcome [5]
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Preterm premature rupture of membranes (PPROM).Rupture of membranes prior to the onset of labour before 37 completed weeks gestation.
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Assessment method [5]
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Medical assessment of maternal temperature (via a thermometer) pulse, uterine tenderness, offensive or discolored liquor (via clinical examination) or histological assessment of placenta.
All data will be collected from medical records.
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Timepoint [5]
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Spontaneous premature rupture of membranes between randomisation and before onset of labour prior to 37 weeks gestation.
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Secondary outcome [6]
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Pre labour rupture of membranes (PROM)
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Assessment method [6]
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An examination of the cervix for fluid leaking from the cervical opening, fetal fibronectin test on the vaginal fluid to confirm diagnosis.
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Timepoint [6]
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Prelabour rupture of membranes prior to the onset of labour at term (after 37 completed weeks gestation).
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Secondary outcome [7]
432739
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Maternal adverse effects from azithromycin.
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Assessment method [7]
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A questionnaire will collect data on a range of side effects. The questionnaire was prepared specifically for this study, listing the most common side-effects of azithromycin.
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Timepoint [7]
432739
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Two weeks after randomisation.
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Secondary outcome [8]
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Gestational age at birth.
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Assessment method [8]
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Calculation of gestational age based on the established estimated delivery date and the actual delivery date. Estimated delivery date will be extracted from patient medical records.
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Timepoint [8]
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At birth.
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Secondary outcome [9]
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Birth weight.
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Assessment method [9]
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All babies are routinely weighed on the day of birth by midwives or nurses providing clinical care. The birth weight will be collected from the official birth record.
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Timepoint [9]
433182
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At birth.
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Secondary outcome [10]
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Perinatal mortality.
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Assessment method [10]
433183
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Observation.
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Timepoint [10]
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Fetal death at any stage following randomisation and prior to birth. Neonatal death up to 28 days following birth.
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Secondary outcome [11]
433184
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Early neurodevelopmental morbidity.
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Assessment method [11]
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Presence of intraventricular haemorrhage on cranial ultrasound or MRI scan of the neonate.
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Timepoint [11]
433184
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Up until hospital discharge following birth.
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Secondary outcome [12]
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Gastrointestinal morbidity due to necrotising enterocolitis.
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Assessment method [12]
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Clinical diagnosis of necrotising enterocolitis made by consultant neonatologists or paediatric surgeons providing clinical care.
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Timepoint [12]
433185
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Up until hospital discharge following birth.
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Secondary outcome [13]
433186
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Infection.
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Assessment method [13]
433186
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Measured as suspected or confirmed neonatal sepsis, requiring treatment with intravenous antibiotics. Data will be extracted from patient medical records.
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Timepoint [13]
433186
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Up until hospital discharge following birth.
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Secondary outcome [14]
433187
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Respiratory morbidity.
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Assessment method [14]
433187
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Measured as diagnosis of Respiratory Distress Syndrome, Bronchopulmonary Dysplasia / Chronic lung disease or requirement for respiratory support of any type prior to discharge from hospital. Data will be extracted from patient medical records.
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Timepoint [14]
433187
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Up until hospital discharge following birth.
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Secondary outcome [15]
433492
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Feasibility.
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Assessment method [15]
433492
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Proportion of eligible participants who consent to randomisation and complete all trial procedures will be calculated based on data captured in ASAPP Screening and Enrolment Log.
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Timepoint [15]
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Proportion of eligible patients who consent to randomisation will be assessed at the time of randomisation.
the proportion of consented participants who complete all trial procedures will be assessed at the conclusion of study.
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Secondary outcome [16]
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Change in maternal microbiome composition.
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Assessment method [16]
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A high vaginal swab for maternal vaginal microbiome analysis will be taken. Samples will be scored by the Nugent scoring system to diagnose bacterial vaginosis. Selected samples will be analysed by next-generation sequencing to determine exact bacterial composition of the vagina.
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Timepoint [16]
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Baseline, two-weeks post-randomisation, 26 weeks’ gestation.
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Eligibility
Key inclusion criteria
Pregnant women from 13 weeks 0 days gestation to 24 weeks 0 days gestation, with cervical length less than or equal to 25.0mm, sonographic appearance of amniotic fluid sludge and absence of symptoms suggestive of labour at randomisation.
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Minimum age
18
Years
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Maximum age
No limit
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Sex
Females
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Can healthy volunteers participate?
No
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Key exclusion criteria
Multiple gestation, major or lethal fetal congenital abnormality, placenta praevia/vasa praevia, PPROM, clinical signs suggestive of chorioamnionitis, indicated preterm delivery at time of randomisation, known allergy to Azithromycin, use of medications likely to prolong QT interval, history of cardiac disease, known hepatic impairment.
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Study design
Purpose of the study
Treatment
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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 will be performed centrally via web based randomisation. Participants will be allocated a numbered container containing the investigational product. All containers will look identical apart from the container number which will correspond to the concealed randomisation sequence. The active and placebo medications inside the bottle will appear identical.
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Stratified 1:1 randomisation with computerised sequence generation.
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Masking / blinding
Blinded (masking used)
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Who is / are masked / blinded?
The people receiving the treatment/s
The people administering the treatment/s
The people assessing the outcomes
The people analysing the results/data
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Intervention assignment
Parallel
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Other design features
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Phase
Phase 2
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Type of endpoint/s
Safety/efficacy
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Statistical methods / analysis
All outcomes will be compared between the intervention and control groups using an intention-to-treat analysis. The proportion of women with sonographic appearances of AFS in both the treatment and control groups will be compared at 2 weeks following randomisation (primary endpoint) and at 26+0 weeks’ gestation (secondary endpoint) using the Chi squared statistic, as this represents categorical data. The mean cervical length in both the treatment and control groups will be compared at 2 weeks following randomisation and at 26+0 weeks’ gestation using the Mann-Whitney U test (assuming the cervical lengths will not be normally distributed), as this represents metric data.
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Recruitment
Recruitment status
Not yet recruiting
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Date of first participant enrolment
Anticipated
1/11/2024
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Actual
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Date of last participant enrolment
Anticipated
1/07/2027
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Actual
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Date of last data collection
Anticipated
1/02/2028
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Actual
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Sample size
Target
84
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
VIC
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Recruitment hospital [1]
26302
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Joan Kirner Women’s and Children’s Hospital - St Albans
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Recruitment hospital [2]
26303
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Monash Medical Centre - Clayton campus - Clayton
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Recruitment hospital [3]
26304
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The Royal Women's Hospital - Parkville
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Recruitment hospital [4]
26305
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Eastern Health - Box Hill
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Recruitment postcode(s) [1]
42274
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3021 - St Albans
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Recruitment postcode(s) [2]
42275
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3168 - Clayton
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Recruitment postcode(s) [3]
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3052 - Parkville
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Recruitment postcode(s) [4]
42277
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3128 - Box Hill
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Funding & Sponsors
Funding source category [1]
316052
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Government body
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Name [1]
316052
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Department of Jobs, Skills, Industry and Regions - Victorian Medical Research Acceleration Fund
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Address [1]
316052
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Country [1]
316052
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Australia
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Primary sponsor type
University
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Name
The University of Melbourne
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Address
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Country
Australia
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Secondary sponsor category [1]
318311
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None
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Name [1]
318311
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Address [1]
318311
0
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Country [1]
318311
0
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
314872
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The Royal Melbourne Hospital Human Research Ethics Committee
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Ethics committee address [1]
314872
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https://www.thermh.org.au/research/researchers/ethics
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Ethics committee country [1]
314872
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Australia
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Date submitted for ethics approval [1]
314872
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13/12/2023
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Approval date [1]
314872
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20/12/2023
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Ethics approval number [1]
314872
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HREC/92838/MH-2023-405816(v2)
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Summary
Brief summary
Multi-centre pilot randomised controlled trial to assess the efficacy of oral Azithromycin in eliminating Amniotic fluid sludge as a surrogate outcome for preterm birth. We hope that the results from this study will help up develop a bigger trial which will directly assess the impact of azithromycin in reducing the risk of preterm birth.
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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
133006
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Prof Joanne Said
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Address
133006
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Sunshine Hospital, 176 Furlong Rd, St Albans, Victoria 3021
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Country
133006
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Australia
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Phone
133006
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+61 411 460 940
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Fax
133006
0
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Email
133006
0
[email protected]
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Contact person for public queries
Name
133007
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Joanne Said
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Address
133007
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Sunshine Hospital, 176 Furlong Rd, St Albans, Victoria 3021
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Country
133007
0
Australia
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Phone
133007
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+61 3 9055 2400
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Fax
133007
0
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Email
133007
0
[email protected]
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Contact person for scientific queries
Name
133008
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Joanne Said
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Address
133008
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Sunshine Hospital, 176 Furlong Rd, St Albans, Victoria 3021
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Country
133008
0
Australia
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Phone
133008
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+61 3 9055 2400
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Fax
133008
0
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Email
133008
0
[email protected]
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Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
Yes
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What data in particular will be shared?
Individual, deidentified participant data underlying published results will be available.
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When will data be available (start and end dates)?
Beginning 12 months after publication up until 5 years after publication.
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Available to whom?
Researchers who provide a methodologically sound proposal at the discretion of the Principal Investigator and Sponsor.
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Available for what types of analyses?
IPD Meta-analyses.
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How or where can data be obtained?
By request to the Principal Investigator (email
[email protected]
).
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What supporting documents are/will be available?
No Supporting Document Provided
Doc. No.
Type
Citation
Link
Email
Other Details
Attachment
21932
Study protocol
[email protected]
387487-(Uploaded-29-05-2024-10-32-56)-ASAPP Protocol v1.2_08Apr2024_clean.docx
21933
Informed consent form
[email protected]
387487-(Uploaded-22-03-2024-11-34-39)-Study-related document.docx
21934
Ethical approval
387487-(Uploaded-22-03-2024-11-35-24)-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