A Study of Apalutamide (JNJ-56021927, ARN-509) Plus Androgen Deprivation Therapy (ADT) Versus ADT in Participants With mHSPC

Official Title

A Phase 3 Randomized, Placebo-controlled, Double-blind Study of Apalutamide Plus Androgen Deprivation Therapy (ADT) Versus ADT in Subjects With Metastatic Hormone-sensitive Prostate Cancer (mHSPC)


The purpose of this study is to determine if the addition of apalutamide to ADT provides superior efficacy in improving radiographic progression-free survival (rPFS) or overall survival (OS) for participants with mHSPC.

Trial Description

Primary Outcome:

  • Radiographic Progression-Free Survival (rPFS)
  • Overall Survival (OS)
Secondary Outcome:
  • Time to Pain Progression
  • Time to Skeletal-Related Event (SRE)
  • Time to Chronic Opioid Use
  • Time to Initiation of Cytotoxic Chemotherapy
This is a randomized (study medication assigned to participants by chance), double-blind (neither the researchers nor the participants know what treatment the participant is receiving), placebo-controlled, multinational, multicentre study of apalutamide in participants with mHSPC. The study consists of 4 Phases: Screening Phase (up to 28 days before randomization), Treatment Phase (28 day treatment cycles until disease progression or the occurrence of unacceptable treatment related toxicity), an End of Treatment Phase (until 30 days after the last dose of study drug), and then a Survival Follow up Phase. In the event of a positive study result and notification of unblinding at either of the interim analyses or at the final analysis, participants in the treatment Phase will have the opportunity to enroll in an Open-label Extension Phase, which will allow participants to receive active drug (apalutamide) for approximately 3 years. The radiographic progression-free survival or overall survival will be evaluated. Participants' safety will be monitored throughout the study.

View this trial on ClinicalTrials.gov

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Canadian Cancer Society

These resources are provided in partnership with the Canadian Cancer Society