OS was defined as the time interval from the date of randomization to the date of death due to any cause. In the absence of confirmation of death, survival time was censored at the last date participant was known to be alive, or at the cut-off date if the participant's last contact was after the cut-off date. The study cut-off date for the final analysis of OS was the date when the 774th death had been observed. Analysis was performed by Kaplan-Meier method.

ITT population included all randomized participants.

PFS: time interval between date of randomization to date of first occurrence of any of following events: tumor progression according to Response Evaluation Criteria In Solid Tumors (RECIST) version 1.1; Prostate Specific Antigen (PSA) progression; pain progression or death due to any cause. Analysis was performed by Kaplan-Meier method.

ITT population included all randomized participants.

Time to tumor progression free survival was defined as the time interval between randomization and the date of first occurrence of tumor progression (assessed using RECIST version 1.1) or death, whichever was earlier. Analysis was performed by Kaplan-Meier method.

ITT population included all randomized participants.

Overall objective tumor response was defined as having a partial response (PR) or complete response (CR) according to the RECIST version 1.1. CR was defined as disappearance of all target and non-target lesions and normalization of tumor marker level. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.

Analysis was performed on ITT population. Number of participants analyzed=participants with measurable disease at baseline and at least one valid post-baseline value analyzed for specified outcome measure.

Time to PSA-PFS: time interval between date of randomization & first occurrence of PSA progression/ death, whichever was earlier. PSA progression:1) In PSA responders(≥50% decline from baseline PSA of ≥10 ng/mL):increase of ≥25%(at least 2 ng/mL)over nadir value, confirmed by second PSA value at least 3 weeks later;2)In PSA non-responders(not achieved ≥50% decline from baseline PSA ≥10 ng/mL):increase of ≥25% (at least 2 ng/mL) over baseline value, confirmed by second PSA value at least 3 weeks later;3)In participants not eligible for PSA response(baseline PSA <10 ng/mL):(a)in participants with baseline PSA>0 ng/mL&<10 ng/mL: increase in PSA by 25% (at least 2 ng/mL) above baseline level, confirmed by second PSA value at least 3weeks apart;(b)in participants with baseline value=0ng/mL: a post baseline PSA value ≥2ng/mL.Early rise in PSA only indicated progression if it was associated with another sign of DP or if it continued beyond 12 weeks. Analysis performed by Kaplan-Meier method.

Analysis was performed on ITT population which included all randomized participants.

PSA response was defined as ≥50% decrease from baseline in serum PSA levels, confirmed by a second PSA value at least 3 weeks later in participants with baseline PSA value ≥10 ng/mL.

Analysis was performed on ITT population. Number of participants analyzed=participants with PSA value ≥10 ng/mL at baseline and at least one valid post-baseline value for specified outcome measure.

Time to pain PFS was defined as the time interval between date of randomization and the date of the first occurrence of pain progression or death, whichever was earlier. Pain progression was defined as an increase of ≥1 point in the median present pain intensity (PPI) score from the nadir confirmed by a second assessment at least 3 weeks later or ≥25 % increase in the mean analgesic score from baseline, due to cancer related pain confirmed by a second assessment at least 3 weeks later or requirement for local palliative radiotherapy. PPI was rated by participant in a diary using a scale of 0=no pain, 1=mild, 2=discomforting, 3=distressing, 4=horrible 5=excruciating. Analgesic use was recorded by the participant in a diary. Analgesic score was calculated from the analgesic use data based on a table of analgesic medications, with non-narcotic medications assigned a value of 1 point and narcotic medications assigned a value of 4 points. Analysis was performed by Kaplan-Meier method.

Analysis was performed on ITT population which included all randomized participants.

Pain response was defined as either a ≥2-point decrease from baseline median PPI score without increase in analgesic score, or a ≥50% decrease in analgesic use from baseline mean analgesic score (only in participants with baseline mean analgesic score≥10) without increase in the pain. Either criterion was maintained for 2 consecutive evaluations at least 3 weeks apart. PPI was rated by participant in a diary using a scale of 0=no pain, 1=mild, 2=discomforting, 3=distressing, 4=horrible 5=excruciating. Analgesic use was recorded by the participant in a diary. Analgesic score was calculated from the analgesic use data based on a table of analgesic medications, with non-narcotic medications assigned a value of 1 point and narcotic medications assigned a value of 4 points.

Analysis was performed on ITT population. Number of participants analyzed=participants with pain score with median PPI >= 2 and/or mean analgesic score >= 10 points at baseline and at least one valid post-baseline value for specified outcome measure.

SRE free survival was defined as the time interval between the date of randomization and the date of the occurrence of the first event defining a SRE or death due to any cause, whichever was earlier. SRE were assessed by clinical evaluation. Occurrence of SRE was defined as: pathological fracture(s) and/or spinal cord compression; need for bone irradiation, including radioisotopes or bone surgery; and change of antineoplastic therapy (including introduction of bisphosphonates or denosumab in the setting of increased pain) to treat bone pain. Analysis was performed by Kaplan-Meier method.

Analysis was performed on ITT population which included all randomized participants.

FACT-P was a 39-item participant rated questionnaire that measures the concerns of participants with prostate cancer. It consisted of 5 sub-scales assessing physical well-being (7 items), social/family well-being (7 items), emotional well-being (6 items), functional well-being (7 items), and prostate-specific concerns (12 items). FACT-P total score was the sum of all 5 subscale scores. It ranged from 0 to156 with higher score indicated better quality of life with fewer symptoms.

Analysis was performed on FACT-P population that included all participants with evaluable individual FACT-P subscale score at baseline and post-baseline on at least 1 of the subscale domains. Here, 'number analyzed' = participants with available data for each specified category.

FACT-P was a 39-item participant rated questionnaire that measures the concerns of participants with prostate cancer. It consisted of 5 sub-scales assessing physical well-being (7 items), social/family well-being (7 items), emotional well-being (6 items), functional well-being (7 items), and prostate-specific concerns (12 items). Physical well being, functional well being, and prostate-specific concerns sub-scales of the FACT-P questionnaire were combined to calculate TOI. Total TOI score ranges from 0 to 104, with higher scores representing a better quality of life with fewer symptoms.

Analysis was performed on FACT-P population that included all participants with evaluable individual FACT-P subscale score at baseline and post-baseline on at least 1 of the subscale domains. Here, 'number analyzed' = participants with available data for each specified category.