Real-World Study of Enzalutamide and Abiraterone Acetate (With Prednisone) Tolerability

Study Overview
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Brief Summary
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The purpose of this study is to characterize the tolerability profiles of enzalutamide and abiraterone acetate (with prednisone) -with specific focus on central nervous system (CNS) tolerability-and quality of life (QoL) after approximately 2 months of participants starting treatment with one of these agents for metastatic castration-resistant prostate cancer (mCRPC).

Detailed Description
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This is a multicenter (more than one study site), open-label (all people know the identity of the intervention), prospective, observational study to characterize the tolerability profile of treatment and quality of life (QoL) in participants receiving enzalutamide or abiraterone acetate (with prednisone) in a clinical practice setting. Approximately 100 male participants will be enrolled into this study, 50 participants will be recruited to each treatment arm. Participants will complete 2 scheduled on-site visits (Baseline and Month 2). Participants will primarily be observed for tolerability profiles of enzalutamide and abiraterone acetate (with prednisone) and safety over an observational period of 2 months.

Official Title
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A Multicenter, Two-arm, Prospective, Observational Study to Characterize the Tolerability of Treatment With Enzalutamide or Abiraterone Acetate (With Prednisone) for Metastatic Castration-Resistant Prostate Cancer (mCRPC)

Conditions
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Prostate Cancer

Intervention / Treatment
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* Other: No Intervention


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male 18 years of age or older Have confirmed metastatic adenocarcinoma of the prostate Are starting treatment with enzalutamide or abiraterone acetate (with prednisone) for metastatic castration-resistant prostate cancer (mCRPC) at the full recommended dose per each drug's respective prescribing information (PI) Have an Eastern Cooperative Oncology Group Performance Status score of 0 or 1 Sign written informed consent Exclusion Criteria: Have a pre-existing central nervous system (CNS) condition (including, but not limited to, history of stroke or dementia) that, in the participating physician's judgment, would preclude participation in the study Have known mental illness including, but not limited to, major depressive disorder, general anxiety disorder, or bipolar disorder that, in the participating physician's opinion, could significantly confound the patient-reported outcome (PRO) assessments Have a history of or ongoing seizure disorder Have severe hepatic impairment (Child-Pugh Class C) Have an active infection (example, human immunodeficiency virus [HIV], viral hepatitis) or other medical condition that would contraindicate the use of prednisone/prednisolone (systemic glucocorticoid) Have known alcohol or other substance abuse disorder Are routinely taking medication-including, but not limited to, over-the-counter medications, supplements, medical marijuana or prescription pain medication-that is known to cause mental confusion or sedation or are using any of the medications Are routinely taking systemic glucocorticoids (example, prednisone, prednisolone, dexamethasone) at a dosage higher than the equivalent of prednisone 10 milligram (mg) daily Are currently using or have previously used chemotherapy for any cancer including mCRPC Are concurrently using any first-generation androgen-receptor blocker (example, bicalutamide, flutamide, nilutamide) for mCRPC Have previously taken enzalutamide or abiraterone acetate with prednisone Are not capable of completing tests using a computerized system or completing a participant survey

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Enzalutamide Group<br>Participants who are receiving enzalutamide in a clinical practice setting will be observed for tolerability and quality of life. | Other: No Intervention<br>* Participants who are receiving enzalutamide or abiraterone acetate in combination with prednisone in a clinical practice setting will be observed for tolerability and quality of life.<br>|
| Abiraterone Acetate plus Prednisone group<br>Participants who are receiving abiraterone acetate in combination with prednisone in a clinical practice setting will be observed for tolerability and quality of life. | Other: No Intervention<br>* Participants who are receiving enzalutamide or abiraterone acetate in combination with prednisone in a clinical practice setting will be observed for tolerability and quality of life.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change From Baseline in Cogstate Tests at Month 2 | The Cogstate computerized cognitive test battery will be used as the assessment tool in this study. Overall, Cogstate measures a range of cognitive functions (example, psychomotor and memory function) using a number of different tests (example, choice reaction time, one-back memory). This battery of tests was chosen because it has been shown to be sensitive to very small cognitive changes and has been tested in cancer participants after chemotherapy. | Baseline and Month 2 | 
| Change From Baseline in European Organization for Research and Treatment of Cancer (EORTC) QLQ-C30 at Month 2 | The EORTC QLQ-C30 is a questionnaire developed to assess the quality of Life (QoL) of cancer participants. The QLQ-C30 incorporates 9 multi-item scales: 5 functional scales (physical, role, cognitive, emotional, and social); 3 symptom scales (fatigue, pain, and nausea and vomiting); and a global health and QoL scale. | Baseline and Month 2 | 
| Change From Baseline in Functional Assessment of Chronic Illness Therapy Fatigue subscale (FACIT-Fatigue) at Month 2 | The FACIT Measurement System is a collection of health-related QoL questionnaires targeted to the management of chronic illness. The fatigue subscale (FACIT-Fatigue) is a validated, 13-item questionnaire that assesses fatigue in people being treated for a chronic illness. | Baseline and Month 2 | 
| Change From Baseline in Functional Assessment of Cancer Therapy-Cognitive Function (FACT-Cog) at Month 2 | The FACT-Cog is a validated, 37-item, subjective neuropsychological instrument designed to evaluate cancer participants perceived cognitive deterioration on their quality of life. | Baseline and Month 2 | 
| Participant or Caregiver Observational Questionnaire (Survey) | If a participant has a regular caregiver, the participating physician will ask the caregiver to complete an optional observational, sponsor-developed questionnaire (survey) pertaining to his/her perception of the participants tolerability of treatment and QoL. | Baseline | 
| Participant or Caregiver Observational Questionnaire (Survey) | If a participant has a regular caregiver, the participating physician will ask the caregiver to complete an optional observational, sponsor-developed questionnaire (survey) pertaining to his/her perception of the participants tolerability of treatment and QoL. | Month 2 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Participants with Adverse Events (AEs) and Serious AEs | An adverse event (AE) is any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. A serious adverse event (SAE) is an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly. | Screening up to follow-up (Approximately 2 Months) | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Prostate Cancer, Observational study, Enzalutamide, Abiraterone Acetate, Prednisone, Tolerability