Metastatic Hormone-sensitive Prostate Cancer (mHSPC)HAYATENCT06661122
A Study to Learn About How Safe Darolutamide is and How Well it Works in Combination With Androgen Deprivation Therapy and Docetaxel in Routine Medical Care for Japanese Men With Low Volume Metastatic Hormone-Sensitive Prostate Cancer
An observational study of Metastatic Hormone-sensitive Prostate Cancer (mHSPC) and Low-volume Metastasis, run by Bayer at 1 site in Japan.
Trial summary
This is an observational study in which medical records of Japanese men with low-volume metastatic hormone-sensitive prostate cancer (mHSPC), who received treatment with a combination therapy of darolutamide with an androgen deprivation therapy (ADT) and docetaxel, will be collected and studied. Read more about this study
- Who is it for?
- Ages 18 years and older, men only
- Conditions the study is for
- Metastatic Hormone-sensitive Prostate Cancer (mHSPC), Low-volume Metastasis
- What is being tested?
- Darolutamide (BAY1841788) + docetaxel + ADT
- How many people
- 100 participants
- Where
- 1 siteJapan
- Study dates
- 18 Nov 2024to 31 Aug 2031
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- Men only
- No healthy volunteers
- Adult, Older adult
Study population: Male patients over the age of 18 years with a diagnosis of low-volume metastasis HSPC whom the decision for treatment with darolutamide in combination with docetaxel and ADT has been made by the physician or a delegate.
Who may be able to join
- Histologically or cytologically confirmed adenocarcinoma of prostate.
- Patients have low-volume of metastatic disease documented by either by a positive bone scan, or for soft tissue either by contrast-enhanced abdominal/pelvic/chest computed tomography (CT) or magnetic resonance imaging (MRI) scan assessed by investigator. Low-volume metastasis criteria is defined as "not" meeting the high-volume criteria of the CHAARTED trial; high-volume meet the presence of visceral metastases, or four or more bone lesions including at least one outside the vertebral column or pelvis.
- Documented diagnosis of mHSPC.
- Patients on triplet regimen previously decided by the investigator irrespective of enrollment in the study.
- Start ADT within 6 months before or at the index date.
- Signed informed consent: If an eligible patient is deceased at the time of study initiation, informed consent from the legally representative(s) of the patient is required. Opt-out consent is acceptable in accordance with the Ethical Guidelines for Medical and Health Research Involving Human Subjects only when it is difficult to obtain signed informed consent from the patient or their legal representative.
Who cannot join
- Patients treated with docetaxel before darolutamide start.
- Participation in an investigational program with interventions outside of routine clinical practice.
- Contra-indications to darolutamide, docetaxel and ADT according to the local marketing authorization.
- Participation in the PASS of darolutamide in patients with mHSPC (DADOX [NCT06010914]).
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
About this study
Official title: An Observational Study of Darolutamide in Addition to Standard Androgen Deprivation Therapy and Docetaxel in Patients With Low-volume Metastatic Hormone-sensitive Prostate Cancer
This is an observational study in which medical records of Japanese men with low-volume metastatic hormone-sensitive prostate cancer (mHSPC), who received treatment with a combination therapy of darolutamide with an androgen deprivation therapy (ADT) and docetaxel, will be collected and studied.
The study drug darolutamide, in combination with ADT and docetaxel is an approved treatment for another type of prostate cancer. To better understand the impact of this combination therapy on low-volume mHSPC and make better treatment choices, more knowledge is needed. ADT is a hormone therapy that lowers the level of testosterone, a male hormone, and slows down the growth of cancer cells. Darolutamide blocks androgen signals to slow the growth of the cancer cells. Docetaxel is a type of chemotherapy used to treat different types of cancer. It works by stopping the growth and spread of cancer cells.
Read more
The prostate gland is a male reproductive gland found below the bladder. Low-volume mHSPC is a cancer of the prostate gland that has spread beyond the gland to three or fewer bones but has not reached organs like the lungs and liver. The prostate cancer is considered hormone sensitive when it responds to an anti hormonal therapy.
In this study, only observations from routine clinical practices will be made. Participants will receive darolutamide, in combination with ADT and docetaxel as prescribed by their doctors during routine medical care. The participants will not receive any advice on treatment or any changes to healthcare as a part of the study.
The main purpose of this study is to learn more about how safe darolutamide is and how well it works in combination with ADT and docetaxel in adult Japanese men with mHSPC in routine medical care.
To do this, researchers will assess the following information about participants after one year of receiving the combination therapy by their doctors:
- the number of participants who achieve normal levels of prostate specific antigen (PSA).
PSA is a protein found in the blood that helps doctors monitor prostate cancer.
- the number of participants who have adverse events (AEs), serious adverse events (SAEs), and adverse events of special Interest (AESIs) that lead to discontinuation or change in the dose of darolutamide or docetaxel during the study.
AEs are medical problems that the participants had during the study that may or may not be related to the study treatment.
SAEs are AEs that lead to death, puts the participant's life at risk, requires hospitalization, causes disability, causes a baby to be born with medical problems, or is medically important.
AESIs are specific medical problems the participants had during the study that may be related to heart, lung, liver etc.
The data will come from the participant's medical records and will be collected between October 2024 and June 2031. Researchers will only look at the health records from adult men with mHSPC in Japan. No separate visits are required as part of the study. The participants will only visit their doctor at the study clinic as part of their routine medical care.
- Being tested
- Darolutamide (BAY1841788) + docetaxel + ADT
- Keywords
- mHSPC
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Darolutamide (BAY1841788) + docetaxel + ADTDrug
Follow clinical practice/administration. ADT=androgen deprivation therapy.
| Study group | Role | What they receive |
|---|---|---|
| mHSPC patients | Adult male patients with a diagnosis of low-volume metastasis HSPC (hormone-sensitive prostate cancer) whom the decision for treatment with darolutamide in combination with docetaxel and ADT has been made by the physician or a delegate. Receives: Drug: Darolutamide (BAY1841788) + docetaxel + ADT |
What is being measured
The primary outcome is the main question the study is designed to answer.
Proportion of patients with absolute prostate-specific antigen (PSA) response at 12 months
Absolute PSA response is defined as blood PSA level <0.2 ng/mL during treatment period. Proportion of patients with absolute PSA response is defined as the number of patients with absolute PSA response, divided by the total number of patients evaluable for absolute PSA response. Proportion of patients with absolute PSA response will be evaluated on patient data up to 12 months after index date.
Measured: after 12 months
Number of patients with adverse event of special interests (AESIs), serious adverse events (SAEs) and adverse events (AEs) leading to dose modification or discontinuation of darolutamide or docetaxel at 12 months
AESIs are defined as: Cardiac disease, Interstitial lung disease, Liver dysfunction, Neutropenia, Febrile neutropenia, Thrombocytopenia, Hypertension, Anemia, Hyperglycemia, Urinary tract infection, Decreased appetite, Fatigue, Nausea, Peripheral neuropathy, Dysgeusia.
Measured: after 12 months
Secondary outcomes (8)
Real-world time to PSA progression in patients who have a documentation of PSA
PSA progression is defined as a ≥ 25% PSA increase above the nadir value and an increase in absolute value of ≥2 ng/mL above nadir. The time to PSA progression is defined as the time from index date to the date of first PSA progression.
Measured: up to 12 months
Real-world time to castration-resistant prostate cancer (CRPC)
Measured: up to 12 months
Time to initiation of subsequent systemic antineoplastic therapy
Measured: up to 12 months
Time to first symptomatic skeletal event (SSE)
An SSE is defined as external beam radiation therapy (EBRT) to relieve skeletal symptoms, or new symptomatic pathologic bone fracture, or occurrence of spinal cord compression or tumor-related orthopedic surgical intervention, whichever comes first.
Measured: up to 12 months
Time to initiation of opioid use for ≥7 consecutive days in patients who are opioid-free at baseline
Measured: up to 12 months
Dosing patterns of darolutamide and docetaxel up to 12 months
The darolutamide and docetaxel administration patterns will be summarized as dosage (initial, overall), duration of administration, number of cycles administered (docetaxel only), dose modification, relative dose intensity (RDI), reason of dose modification or discontinuation.
Measured: after 12 months
Summary description of patient demographics / characteristics
Age at baseline, Age category, Race (Japanese or not), Physical examination including height and weight, Body Mass Index (BMI), BMI category, Comorbidities (Cardiac disease, Lung disease, Liver dysfunction, etc.), ECOG PS (Eastern Cooperative Oncology Group Performance Status), and other medical history.
Measured: after 12 months
Summary description of laboratory values
Descriptive statistics (i.e. number of observations) will be presented for the laboratory values, their changes from baseline (including baseline value), and their percent changes from baseline.
Measured: after 12 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted28 Oct 2024
- Study start18 Nov 2024
- Primary completion31 Mar 2031 (estimated)
- Study completion31 Aug 2031 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Metastatic Hormone-sensitive Prostate Cancer (mHSPC)Studies of the same condition, open and under way.
- More trials run by BayerThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 100 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Bayer
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06661122
- Sponsor's protocol ID
- 22842
- Acronym
- HAYATE
- Status last verified
- Oct 2026
- First submitted
- 23 Oct 2024
- Last updated
- 20 Oct 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: Availability of this study's data will later be determined according to Bayer's commitment to the EFPIA/PhRMA "Principles for responsible clinical trial data sharing". This pertains to scope, timepoint and process of data access. As such, Bayer commits to sharing upon request from qualified researchers patient-level clinical trial data, study-level clinical trial data, and protocols from clinical trials in patients for medicines and indications approved in the US and EU as necessary for conducting legitimate research. This applies to data on new medicines and indications that have been approved by the EU and US regulatory agencies on or after January 01, 2014. Interested researchers can use www.vivli.org to request access to anonymized patient-level data and supporting documents from clinical studies to conduct research. Information on the Bayer criteria for listing studies and other relevant information is provided in the member section of the portal.
Study at a glance
From the registry record, last updated by the sponsor on 20 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- An Observational Study of Darolutamide in Addition to Standard Androgen Deprivation Therapy and Docetaxel in Patients With Low-volume Metastatic Hormone-sensitive Prostate Cancer
- ClinicalTrials.gov ID
- NCT06661122
- Acronym / sponsor ID
- HAYATE / 22842
- Keywords
- mHSPC
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 100 participants (estimated)
- Lead sponsor
- BayerIndustry (pharma, biotech, devices)
- Study start
- 18 Nov 2024 (actual)
- Primary completion
- 31 Mar 2031 (estimated)
- Study completion
- 31 Aug 2031 (estimated)
- First posted
- 28 Oct 2024 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This is an observational study in which medical records of Japanese men with low-volume metastatic hormone-sensitive prostate cancer (mHSPC), who received treatment with a combination therapy of darolutamide with an androgen deprivation therapy (ADT) and docetaxel, will be collected and studied.
The study drug darolutamide, in combination with ADT and docetaxel is an approved treatment for another type of prostate cancer. To better understand the impact of this combination therapy on low-volume mHSPC and make better treatment choices, more knowledge is needed. ADT is a hormone therapy that lowers the level of testosterone, a male hormone, and slows down the growth of cancer cells. Darolutamide blocks androgen signals to slow the growth of the cancer cells. Docetaxel is a type of chemotherapy used to treat different types of cancer. It works by stopping the growth and spread of cancer cells.
The prostate gland is a male reproductive gland found below the bladder. Low-volume mHSPC is a cancer of the prostate gland that has spread beyond the gland to three or fewer bones but has not reached organs like the lungs and liver. The prostate cancer is considered hormone sensitive when it responds to an anti hormonal therapy.
In this study, only observations from routine clinical practices will be made. Participants will receive darolutamide, in combination with ADT and docetaxel as prescribed by their doctors during routine medical care. The participants will not receive any advice on treatment or any changes to healthcare as a part of the study.
The main purpose of this study is to learn more about how safe darolutamide is and how well it works in combination with ADT and docetaxel in adult Japanese men with mHSPC in routine medical care.
To do this, researchers will assess the following information about participants after one year of receiving the combination therapy by their doctors:
- the number of participants who achieve normal levels of prostate specific antigen (PSA).
PSA is a protein found in the blood that helps doctors monitor prostate cancer.
- the number of participants who have adverse events (AEs), serious adverse events (SAEs), and adverse events of special Interest (AESIs) that lead to discontinuation or change in the dose of darolutamide or docetaxel during the study.
AEs are medical problems that the participants had during the study that may or may not be related to the study treatment.
SAEs are AEs that lead to death, puts the participant's life at risk, requires hospitalization, causes disability, causes a baby to be born with medical problems, or is medically important.
AESIs are specific medical problems the participants had during the study that may be related to heart, lung, liver etc.
The data will come from the participant's medical records and will be collected between October 2024 and June 2031. Researchers will only look at the health records from adult men with mHSPC in Japan. No separate visits are required as part of the study. The participants will only visit their doctor at the study clinic as part of their routine medical care.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| mHSPC patients | – | Drug: Darolutamide (BAY1841788) + docetaxel + ADTAdult male patients with a diagnosis of low-volume metastasis HSPC (hormone-sensitive prostate cancer) whom the decision for treatment with darolutamide in combination with docetaxel and ADT has been made by the physician or a delegate. |
Who may qualify
- Ages
- 18 years and older
- Sex
- Male only
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Male patients over the age of 18 years with a diagnosis of low-volume metastasis HSPC whom the decision for treatment with darolutamide in combination with docetaxel and ADT has been made by the physician or a delegate.
Key inclusion criteria (6 listed)
- Histologically or cytologically confirmed adenocarcinoma of prostate.
- Patients have low-volume of metastatic disease documented by either by a positive bone scan, or for soft tissue either by contrast-enhanced abdominal/pelvic/chest computed tomography (CT) or magnetic resonance imaging (MRI) scan assessed by investigator. Low-volume metastasis criteria is defined as "not" meeting the high-volume criteria of the CHAARTED trial; high-volume meet the presence of visceral metastases, or four or more bone lesions including at least one outside the vertebral column or pelvis.
- Documented diagnosis of mHSPC.
- Patients on triplet regimen previously decided by the investigator irrespective of enrollment in the study.
- Start ADT within 6 months before or at the index date.
Key exclusion criteria (4 listed)
- Patients treated with docetaxel before darolutamide start.
- Participation in an investigational program with interventions outside of routine clinical practice.
- Contra-indications to darolutamide, docetaxel and ADT according to the local marketing authorization.
- Participation in the PASS of darolutamide in patients with mHSPC (DADOX [NCT06010914]).
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Darolutamide (BAY1841788) + docetaxel + ADTFollow clinical practice/administration. ADT=androgen deprivation therapy. | Drug | mHSPC patients |
Primary outcome
Proportion of patients with absolute prostate-specific antigen (PSA) response at 12 months
Time frame: after 12 months
Absolute PSA response is defined as blood PSA level <0.2 ng/mL during treatment period. Proportion of patients with absolute PSA response is defined as the number of patients with absolute PSA response, divided by the total number of patients evaluable for absolute PSA response. Proportion of patients with absolute PSA response will be evaluated on patient data up to 12 months after index date.
Number of patients with adverse event of special interests (AESIs), serious adverse events (SAEs) and adverse events (AEs) leading to dose modification or discontinuation of darolutamide or docetaxel at 12 months
Time frame: after 12 months
AESIs are defined as: Cardiac disease, Interstitial lung disease, Liver dysfunction, Neutropenia, Febrile neutropenia, Thrombocytopenia, Hypertension, Anemia, Hyperglycemia, Urinary tract infection, Decreased appetite, Fatigue, Nausea, Peripheral neuropathy, Dysgeusia.
8 secondary outcomes
Real-world time to PSA progression in patients who have a documentation of PSA
Time frame: up to 12 months
Real-world time to castration-resistant prostate cancer (CRPC)
Time frame: up to 12 months
Time to initiation of subsequent systemic antineoplastic therapy
Time frame: up to 12 months
Time to first symptomatic skeletal event (SSE)
Time frame: up to 12 months
Time to initiation of opioid use for ≥7 consecutive days in patients who are opioid-free at baseline
Time frame: up to 12 months
Dosing patterns of darolutamide and docetaxel up to 12 months
Time frame: after 12 months
Summary description of patient demographics / characteristics
Time frame: after 12 months
Summary description of laboratory values
Time frame: after 12 months
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 20 Oct 2026.
- Individual participant dataSharing planned: No. Availability of this study's data will later be determined according to Bayer's commitment to the EFPIA/PhRMA "Principles for responsible clinical trial data sharing". This pertains to scope, timepoint and process of data access. As such, Bayer commits to sharing upon request from qualified researchers patient-level clinical trial data, study-level clinical trial data, and protocols from clinical trials in patients for medicines and indications approved in the US and EU as necessary for conducting legitimate research. This applies to data on new medicines and indications that have been approved by the EU and US regulatory agencies on or after January 01, 2014. Interested researchers can use www.vivli.org to request access to anonymized patient-level data and supporting documents from clinical studies to conduct research. Information on the Bayer criteria for listing studies and other relevant information is provided in the member section of the portal.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Metastatic Hormone-sensitive Prostate Cancer (mHSPC) and Low-volume Metastasis, run by Bayer at 1 site in Japan.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 6 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 20 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Japan. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Bayer Clinical Trials Contact (0018888422937, clinical-trials-contact@bayer.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Proportion of patients with absolute prostate-specific antigen (PSA) response at 12 months (time frame: after 12 months). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Oct 2026.