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Trial details imported from ClinicalTrials.gov
For full trial details, please see the original record at
https://clinicaltrials.gov/study/NCT06136624
Registration number
NCT06136624
Ethics application status
Date submitted
13/11/2023
Date registered
18/11/2023
Titles & IDs
Public title
Study of Opevesostat (MK-5684) Versus Alternative NHA in mCRPC (MK-5684-003)
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Scientific title
A Phase 3 Randomized, Open-label Study of MK-5684 Versus Alternative Abiraterone Acetate or Enzalutamide in Participants With Metastatic Castration-resistant Prostate Cancer (mCRPC) Previously Treated With Next-generation Hormonal Agent (NHA) and Taxane-based Chemotherapy
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Secondary ID [1]
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2023-504899-25
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Secondary ID [2]
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5684-003
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Prostate Cancer Metastatic
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Condition category
Condition code
Cancer
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Prostate
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Treatment: Drugs - Opevesostat
Treatment: Drugs - Abiraterone acetate
Treatment: Drugs - Enzalutamide
Treatment: Drugs - Hydrocortisone
Treatment: Drugs - Fludrocortisone acetate
Treatment: Drugs - Prednisone
Treatment: Drugs - Dexamethasone
Experimental: Opevesostat - Participants receive opevesostat 5 mg by oral tablets twice daily (bid) plus dexamethasone 1.5 mg by oral tablets once daily (qd) and 0.1 mg fludrocortisone acetate by oral tablet qd until progression. Hydrocortisone 100 mg (oral or intramuscular \[IM\]) dose will also be provided to participants for use as rescue medication.
Active comparator: Abiraterone Acetate or Enzalutamide - Participants receive abiraterone 1000 mg qd by oral tablets plus prednisone 5 mg bid by oral tablets or enzalutamide 160 mg qd by oral tablets.
Treatment: Drugs: Opevesostat
Administered orally
Treatment: Drugs: Abiraterone acetate
Administered orally
Treatment: Drugs: Enzalutamide
Administered orally
Treatment: Drugs: Hydrocortisone
Administered orally or IM as a rescue medication
Treatment: Drugs: Fludrocortisone acetate
Administered orally
Treatment: Drugs: Prednisone
Administered orally
Treatment: Drugs: Dexamethasone
Administered orally as rescue medication
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Intervention code [1]
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Treatment: Drugs
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Comparator / control treatment
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Control group
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Outcomes
Primary outcome [1]
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Overall Survival (OS) in Androgen Receptor Ligand Binding Domain (AR LBD) Mutation-Positive Participants
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Assessment method [1]
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OS is defined as time from randomization to death due to any cause. OS in AR LBD mutation-positive participants will be reported for each study arm.
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Timepoint [1]
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Up to ~54 months
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Primary outcome [2]
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OS in AR LBD Mutation-Negative Participants
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Assessment method [2]
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OS is defined as time from randomization to death due to any cause. OS in AR LBD mutation-negative participants will be reported for each study arm.
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Timepoint [2]
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Up to ~54 months
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Primary outcome [3]
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Radiographic Progression-free Survival (rPFS) Per Prostate Cancer Working Group-modified Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) as Assessed by Blinded Independent Central Review in AR LBD Mutation-Positive Participant
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Assessment method [3]
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rPFS is defined as the time from randomization to the first documented disease progression per Prostate Cancer Working Group (PCWG)-modified Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) as assessed by Blinded Independent Central Review (BICR) or death due to any cause, whichever occurs first. rPFS in AR LBD mutation-positive participants will be reported for each study arm.
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Timepoint [3]
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Up to ~36 months
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Primary outcome [4]
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rPFS Per Prostate Cancer Working Group-modified RECIST 1.1 as Assessed by Blinded Independent Central Review in AR LBD Mutation-Negative Participants
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Assessment method [4]
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rPFS is defined as the time from randomization to the first documented disease progression per PCWG-modified RECIST 1.1 as assessed by BICR or death due to any cause, whichever occurs first. rPFS in AR LBD mutation-negative participants will be reported for each study arm.
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Timepoint [4]
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Up to ~36 months
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Secondary outcome [1]
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Time to Initiation of the First Subsequent Anti-Cancer Therapy or Death (TFST)
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Assessment method [1]
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TFST is defined as the time from randomization to initiation of the first subsequent anticancer therapy or death, whichever occurs first.
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Timepoint [1]
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Up to ~54 months
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Secondary outcome [2]
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Objective Response (OR)
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Assessment method [2]
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OR is determined by PCWG-modified RECIST 1.1 as assessed by BICR.
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Timepoint [2]
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Up to ~54 months
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Secondary outcome [3]
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Duration of Response (DOR)
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Assessment method [3]
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DOR is determined by PCWG-modified RECIST 1.1 as assessed by BICR.
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Timepoint [3]
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Up to ~54 months
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Secondary outcome [4]
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Time to Pain Progression (TTPP)
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Assessment method [4]
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TTPP is assessed by Brief Pain Inventory-Short Form (BPI-SF) Item 3 ("Worst Pain in 24 Hours") and opiate analgesic use (Analgesic Quantification Algorithm \[AQA\] Score).
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Timepoint [4]
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Up to ~54 months
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Secondary outcome [5]
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Time to Prostate-specific Antigen (PSA) Progression
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Assessment method [5]
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The time from randomization to PSA progression. The PSA progression date is defined as the date of either: 1) =25% increase and =2 ng/mL above the nadir, confirmed by a second value =3 weeks later if there is PSA decline from baseline 2) =25% increase and =2 ng/mL increase from baseline beyond 12 weeks if there is no PSA decline from baseline.
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Timepoint [5]
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Up to ~54 months
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Secondary outcome [6]
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Time to First Symptomatic Skeletal-related Event (SSRE)
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Assessment method [6]
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The time from randomization to the first occurrence of any of the following symptomatic skeletal-related events: 1) Use of EBRT to prevent or relieve skeletal symptoms; 2) new symptomatic pathologic bone fracture (vertebral or nonvertebral); 3) spinal cord compression; or 4) tumor-related orthopedic surgical intervention.
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Timepoint [6]
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Up to ~54 months
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Secondary outcome [7]
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Number of Participants Who Experience an Adverse Event
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Assessment method [7]
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An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention.
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Timepoint [7]
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Up to ~54 months
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Secondary outcome [8]
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Number of Participants Who Discontinue Study Treatment Due to an Adverse Event
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Assessment method [8]
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An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention.
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Timepoint [8]
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Up to ~54 months
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Eligibility
Key inclusion criteria
* Has histologically- or cytologically-confirmed adenocarcinoma of the prostate without small cell histology
* Has prostate cancer progression while on androgen deprivation therapy (or post bilateral orchiectomy) within 6 months before Screening
* Has current evidence of metastatic disease documented by either bone lesions on bone scan and/or soft tissue disease by computed tomography/magnetic resonance imaging (CT/MRI)
* Has disease that progressed during or after treatment with 1 novel hormonal agent (NHA)
* Has received 1 but no more than 2 taxane-based chemotherapy regimens for metastatic castration-resistant prostate cancer (mCRPC) and has had progressive disease (PD) during or after treatment
* Has ongoing androgen deprivation with serum testosterone <50 ng/dL (<1.7 nM)
* Has provided tumor tissue from a fresh core or excisional biopsy from soft tissue not previously irradiated
* Has an Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 assessed within 7 days of randomization
* Has had prior treatment with PARPi or were deemed ineligible to receive treatment by the investigator or have refused PARPi treatment
* Has received prior 177Lu-PSMA-617 or were deemed ineligible to receive 177Lu-PSMA-617 treatment by the investigator or refused 177Lu-PSMA-617 treatment
* Participants who have not received cabazitaxel can be enrolled if they are ineligible for cabazitaxel treatment as determined by the investigator or have refused treatment
* If participant received first generation anti-androgen therapy before screening, the participant has evidence of disease progression >4 weeks since the last flutamide treatment and >6 weeks since the last bicalutamide or nilutamide treatment
* Participants receiving bone resorptive therapy (including, but not limited to, bisphosphonate or denosumab) must have been on stable doses for = 4 weeks before the date of randomization
* Participants with human immunodeficiency virus (HIV) infection must have well controlled HIV on antiretroviral therapy (ART)
* Participants who are hepatitis B surface antigen (HBsAg) positive are eligible if they have received hepatitis B virus (HBV) antiviral therapy for at least 4 weeks and have undetectable HBV viral load before randomization
* Participants with history of hepatitis C virus (HCV) infection are eligible if HCV viral load is undetectable at Screening.
* Participants who can produce sperm must agree to the following during the study treatment period and for at least 7 days after the last dose of opevesostat, for at least 30 days after the last dose of abiraterone acetate, and for at least 3 months after the last dose of enzalutamide: EITHER be abstinent OR must agree to use male condom
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Minimum age
No limit
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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
* Has a gastrointestinal disorder that might affect absorption
* Has a history of pituitary dysfunction
* Has poorly controlled diabetes mellitus
* Has clinically significant abnormal serum potassium or sodium level
* Has a history of active or unstable cardio/cerebro-vascular disease, including thromboembolic events
* Has a history of seizure within 6 months of providing documented informed consent or any condition that may predispose to seizures within 12 months before the date of randomization
* Has a history of clinically significant ventricular arrhythmias
* Has received an anticancer monoclonal antibody (mAb) within 4 weeks before the date of randomization, or has not recovered from adverse events (AEs) due to mAbs administered more than 4 weeks before the date of randomization
* Has undergone major surgery, including local prostate intervention (except prostate biopsy), within 28 days before the date of randomization, and has not recovered from the toxicities and/or complications
* Participants who have not adequately recovered from major surgery or have ongoing surgical complications
* Has used herbal or medicinal products that may have hormonal anti-prostate cancer activity and/or are known to decrease prostate-specific Antigen (PSA) (eg, saw palmetto, megesterol acetate) within 4 weeks before the date of randomization
* Has received radium-223 or lutetium-177 within 4 weeks before the date of randomization, or has not recovered to Grade =1 or baseline from AEs due to radium-223 or lutetium-177 administered more than 4 weeks before the date of randomization
* Has received treatment with 5-areductase inhibitors (eg, finasteride or dutasteride), estrogens, or cyproterone within 4 weeks before the date of randomization
* Has received colony-stimulating factors within 28 days before the date of randomization
* Has received a whole blood transfusion in the last 120 days before the date of randomization. Packed red blood cells and platelet transfusions are acceptable if not given within 28 days of the date of randomization
* Has received prior targeted small molecule therapy or NHA treatment within 4 weeks before the first dose of study intervention as follows: enzalutamide or apalutamide within 3 weeks or abiraterone acetate + prednisone or darolutamide within 2 weeks
* Has a "superscan" bone scan
* Has a diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy or any other form of immunosuppressive therapy within 7 days prior the first dose of study medication
* Has a known additional malignancy that is progressing or has required active treatment within the past 3 years
* Has known active central nervous system (CNS) metastases and/or carcinomatous meningitis
* Has an active autoimmune disease that has required systemic treatment in past 2 years
* Has an active infection requiring systemic therapy
* Has concurrent active HBV or known active HCV infection
* Has a history of long QTc syndrome
* Has any of the following at Screening Visit: hypotension (systolic BP <110 mm Hg) or uncontrolled hypertension (systolic BP =160 mm Hg or diastolic BP =90 mm Hg, in 2 out of 3 recordings with optimized antihypertensive therapy)
* Is unable to swallow capsules/tablets
* Is currently being treated with cytochrome 450-inducing antiepileptic drugs for seizures
* Participants on an unstable dose of thyroid hormone therapy within 6 months before the start of the study intervention
* Received prior systemic anticancer therapy including investigational agents within 4 weeks before the first dose of study intervention
* Received prior radiotherapy within 2 weeks of start of study intervention, or radiation-related toxicities, requiring corticosteroids
* Received a live or live-attenuated vaccine within 30 days before the first dose of study intervention
* Systemic use of the following medications within 2 weeks before the first dose of study intervention: strong CYP3A4 inducers (eg, avasimibe, carbamazepine, lumacaftor, phenobarbital, rifampicin, rifapentine, or St John's Wort); P-gp inhibitors (eg, erythromycin, clarithromycin, rifampicin, ketoconazole, itraconazole, posaconazole, artesunate-pyronaridine, ritonavir, indinavir, nelfinavir, atazanavir, glecaprevir-pibrentasvir, simeprevir, ledipasvir-sofosbuvir, verapamil, diltiazem, dronedarone, propafenone, quinidine, cyclosporine, valspodar, or milk thistle [Silybum marianum])
* Use of aldosterone antagonist (eg, spironolactone, eplerenone) and phenytoin within 4 weeks before the start of the study intervention
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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)
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Methods used to generate the sequence in which subjects will be randomised (sequence 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
Parallel
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Other design features
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Phase
Phase 3
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Type of endpoint/s
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Statistical methods / analysis
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Recruitment
Recruitment status
Recruiting
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Data analysis
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Reason for early stopping/withdrawal
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Other reasons
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Date of first participant enrolment
Anticipated
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Actual
31/12/2023
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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
2/08/2028
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Actual
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Sample size
Target
1200
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
NSW,QLD,VIC
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Recruitment hospital [1]
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Dubbo Hospital ( Site 0235) - Dubbo
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Recruitment hospital [2]
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Macquarie University-MQ Health Clinical Trials Unit ( Site 0234) - Macquarie University
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Westmead Hospital-Department of Medical Oncology ( Site 0232) - Westmead
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Recruitment hospital [4]
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Princess Alexandra Hospital-Cancer Care Serices ( Site 0237) - Brisbane
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Recruitment hospital [5]
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Peter MacCallum Cancer Centre-Parkville Cancer Clinical Trials Unit (PCCTU) ( Site 0230) - Melbourne
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Recruitment postcode(s) [1]
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2830 - Dubbo
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Recruitment postcode(s) [2]
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2109 - Macquarie University
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Recruitment postcode(s) [3]
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2145 - Westmead
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Recruitment postcode(s) [4]
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4102 - Brisbane
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Recruitment postcode(s) [5]
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3000 - Melbourne
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Recruitment outside Australia
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0
Israel
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State/province [74]
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0
Haifa
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0
0
Israel
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0
Jerusalem
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Country [76]
0
0
Israel
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State/province [76]
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0
Kfar Saba
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Country [77]
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0
Israel
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0
Petah Tikva
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Country [78]
0
0
Israel
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State/province [78]
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0
Ramat Gan
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Country [79]
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0
Italy
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State/province [79]
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0
Emilia-Romagna
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Country [80]
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Italy
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0
Lombardia
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Country [81]
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Italy
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State/province [81]
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Milano
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Country [82]
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0
Japan
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State/province [82]
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Chiba
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Country [83]
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Japan
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State/province [83]
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0
Fukuoka
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Country [84]
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0
Japan
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State/province [84]
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0
Hokkaido
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Country [85]
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0
Japan
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State/province [85]
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0
Hyogo
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Country [86]
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0
Japan
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State/province [86]
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0
Ishikawa
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Country [87]
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0
Japan
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State/province [87]
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Kagawa
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Country [88]
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Japan
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State/province [88]
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Kanagawa
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Country [89]
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Japan
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State/province [89]
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0
Nagasaki
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Country [90]
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Japan
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State/province [90]
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Nara
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Country [91]
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0
Japan
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State/province [91]
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Okinawa
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Country [92]
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0
Japan
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State/province [92]
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0
Osaka
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Country [93]
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0
Japan
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State/province [93]
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0
Saga
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Country [94]
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0
Japan
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0
Akita
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Country [95]
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0
Japan
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Gifu
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Country [96]
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0
Japan
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State/province [96]
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0
Hiroshima
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Country [97]
0
0
Japan
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State/province [97]
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0
Kagoshima
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Country [98]
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0
Japan
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State/province [98]
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0
Kumamoto
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Country [99]
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0
Japan
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State/province [99]
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Miyazaki
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Country [100]
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0
Japan
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State/province [100]
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0
Nagano
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Country [101]
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0
Japan
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State/province [101]
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Oita
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Country [102]
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0
Japan
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State/province [102]
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0
Tokyo
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0
Korea, Republic of
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State/province [103]
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Seoul
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0
Malaysia
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State/province [104]
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Johor
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Malaysia
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State/province [105]
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Kuala Lumpur
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Malaysia
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State/province [106]
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Sarawak
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Country [107]
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Netherlands
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State/province [107]
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Gelderland
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Country [108]
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Netherlands
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State/province [108]
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Limburg
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Country [109]
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Netherlands
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State/province [109]
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Noord-Brabant
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Country [110]
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Netherlands
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State/province [110]
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Noord-Holland
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Country [111]
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Netherlands
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State/province [111]
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Utrecht
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0
Netherlands
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State/province [112]
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Zuid-Holland
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Country [113]
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New Zealand
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State/province [113]
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Bay Of Plenty
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Country [114]
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New Zealand
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State/province [114]
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Otago
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Country [115]
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Norway
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State/province [115]
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Akershus
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Norway
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State/province [116]
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Ostfold
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Norway
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State/province [117]
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Sor-Trondelag
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Country [118]
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Poland
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State/province [118]
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Kujawsko-pomorskie
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Country [119]
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Poland
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Mazowieckie
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Country [120]
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Poland
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Swietokrzyskie
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Poland
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Zachodniopomorskie
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Puerto Rico
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State/province [122]
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Ponce
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Puerto Rico
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San Juan
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Singapore
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State/province [124]
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Central Singapore
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Country [125]
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Spain
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State/province [125]
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Cadiz
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Country [126]
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Spain
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State/province [126]
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0
Madrid, Comunidad De
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Country [127]
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Spain
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State/province [127]
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0
Orense
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Spain
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State/province [128]
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0
Valenciana, Comunitat
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Country [129]
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Spain
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State/province [129]
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Lugo
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Spain
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Sevilla
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Sweden
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Stockholms Lan
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Country [132]
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Sweden
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Uppsala Lan
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Country [133]
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Sweden
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Vastra Gotalands Lan
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Taiwan
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State/province [134]
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Taichung
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Taiwan
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Tainan
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Country [136]
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Taiwan
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Taipei
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0
Taiwan
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Taoyuan
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Country [138]
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Thailand
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Khon Kaen
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Thailand
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Krung Thep Maha Nakhon
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Country [140]
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Turkey
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0
Adana
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Country [141]
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Turkey
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Ankara
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Country [142]
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Turkey
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State/province [142]
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0
Istanbul
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Country [143]
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0
United Kingdom
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0
Cambridgeshire
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Country [144]
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0
United Kingdom
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0
England
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0
United Kingdom
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0
Glasgow City
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Country [146]
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0
United Kingdom
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0
Hammersmith And Fulham
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0
United Kingdom
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0
London, City Of
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Country [148]
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0
United Kingdom
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State/province [148]
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0
Manchester
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Funding & Sponsors
Primary sponsor type
Commercial sector/industry
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Name
Merck Sharp & Dohme LLC
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Address
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Country
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Other collaborator category [1]
0
0
Commercial sector/industry
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Name [1]
0
0
Orion Corporation, Orion Pharma
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Address [1]
0
0
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Country [1]
0
0
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Ethics approval
Ethics application status
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Summary
Brief summary
This is a phase 3, randomized, open-label study of opevesostat compared to alternative abiraterone acetate or enzalutamide in participants with metastatic castration-resistant prostate cancer (mCRPC) with respect to overall survival (OS) and to radiographic progression-free survival (rPFS) per Prostate Cancer Working Group (PCWG) Modified Response Evaluation Criteria In Solid Tumors (RECIST 1.1) as assessed by blinded independent central review (BICR) in participants with mCRPC previously treated with next-generation hormonal agent (NHA) and taxane-based chemotherapy. It is hypothesized that opevesostat is superior with respect to OS and rPFS per PCWG Modified RECIST 1.1 as assessed by BICR in androgen receptor ligand binding domain (AR LBD) mutation-negative and -positive participants.
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Trial website
https://clinicaltrials.gov/study/NCT06136624
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Trial related presentations / publications
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Public notes
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Contacts
Principal investigator
Name
0
0
Medical Director
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Address
0
0
Merck Sharp & Dohme LLC
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Country
0
0
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Phone
0
0
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Fax
0
0
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Email
0
0
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Contact person for public queries
Name
0
0
Toll Free Number
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Address
0
0
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Country
0
0
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Phone
0
0
1-888-577-8839
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Fax
0
0
Query!
Email
0
0
[email protected]
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Contact person for scientific queries
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?
http://engagezone.msd.com/doc/ProcedureAccessClinicalTrialData.pdf
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When will data be available (start and end dates)?
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Available to whom?
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Available for what types of analyses?
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How or where can data be obtained?
IPD available at link: http://engagezone.msd.com/ds_documentation.php
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What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
No documents have been uploaded by study researchers.
Results not provided in
https://clinicaltrials.gov/study/NCT06136624