A Phase 3 interventional study of bicalutamide and radiation therapy in Prostate Cancer, sponsored by Radiation Therapy Oncology Group. Completed at 240 sites in 2 countries. Open to male participants. Per ClinicalTrials.gov, last updated 2022-06-15.
Sponsored by Radiation Therapy Oncology Group · Phase 3, Interventional, and Treatment
RATIONALE: Radiation therapy uses high-energy x-rays to damage tumor cells. Androgens can stimulate the growth of prostate cancer cells. Hormone therapy using bicalutamide may fight prostate cancer by reducing the production of androgens. It is not yet known if radiation therapy is more effective with or without bicalutamide for prostate cancer.
PURPOSE: Randomized phase III trial to compare the effectiveness of radiation therapy with or without bicalutamide in treating patients who have stage II or stage III prostate cancer and elevated prostate-specific antigen (PSA) levels following radical prostatectomy.
6,370 studies on the registry are indexed under Prostatic Neoplasms; 1,400 are open to participants now.
This study's enrollment of 840 is above the median of 58 across 4,822 interventional studies indexed under Prostatic Neoplasms.
Browse Prostatic Neoplasms studies →Radiation Therapy Oncology Group is the lead sponsor of 154 studies on the registry; none are open to participants now.
Counted across the registry records on this site, refreshed daily.
Conditions for Patient Eligibility:
Conditions for Patient Ineligibility:
Radiation therapy + bicalutamide
Drug: bicalutamide · Radiation: radiation therapy
Radiation therapy + placebo
Radiation: radiation therapy · Drug: placebo
One (150 mg) tablet by mouth daily for two years beginning immediately upon, or just prior to, the initiation of irradiation.
Also known as: Casodex
64.8 Gy in 36 fractions (1.8 Gy in 5 daily sessions per week) to the original prostate volume, the tumor resection bed, and the proximal membranous urethra.
One tablet by mouth daily for two years beginning immediately upon, or just prior to, the initiation of irradiation.
Overall Survival (12-year Rates Reported)
Overall survival rates were estimated by the Kaplan-Meier method, with failure defined as death by any cause. Four-year follow-up was required of all patients, twelve-year rates are reported. Four-year follow-up was required of all patients, but twelve-year rates were reported. Patients are followed until death.
Time frame: From date of randomization to 12 years.
Non-Prostate Cancer Death (12-year Rates Reported)
Non-prostate cancer death rates were estimated by the cumulative incidence method, with failure defined as any death that does not fall into the following categories: death due to prostate cancer or complications of protocol treatment (centrally reviewed), death with known progressive metastatic disease while on salvage hormone therapy, or death with a known rising PSA while on salvage hormone therapy. All other deaths are considered competing risks. Patients alive at time of analysis were censored. Any other death was treated as a competing risk. Four-year follow-up was required of all patients, but twelve-year rates were reported. Patients are followed until death. "Non-Prostate cancer death" is a more accurate wording for the protocol endpoint of "non-disease-specific survival", and matches the protocol definition.
Time frame: From date of randomization to 12 years.
Second PSA Recurrence (12-year Rates Reported)
Second PSA recurrence (SPSAR) rates (i.e. first PSA failure on study) were estimated by the cumulative incidence method, with failure defined as the first occurrence of one of the following events: 1. Increase in PSA following protocol treatment according to the following criteria met during protocol treatment: If PSA dropped to undetectable level (\<0.2 ng/ml) during protocol treatment (PT) then failure = increase after PT to \>= 0.5 ng/ml ; If PSA decreased to a detectable level (≥ 0.2 ng/ml) during PT, then failure = increase PT of \>= 0.3 ng/ml above the lowest detectable level; If PSA did not decrease during PT then failure = increase in PSA after PT of \>= 0.5 ng/ml above entry PSA level. 2. The start of salvage hormone therapy. Patients alive without SPSAR at time of analysis were censored. Death without SPSAR was treated as a competing risk. Four-year follow-up was required of all patients, but twelve-year rates were reported. Patients are followed until death.
Time frame: From date of randomization to 12 years.
Third PSA Recurrence (12-year Rates Reported)
Third PSA recurrence rates (i.e. second PSA failure on study) were estimated by the cumulative incidence method, with failure defined as PSA value of 0.5ng/ml or higher or any disease progression after starting salvage hormone therapy. Patients alive without third PSA recurrence at time of analysis were censored. Death without third PSA recurrence was treated as a competing risk. Four-year follow-up was required of all patients, but twelve-year rates were reported. Patients are followed until death.
Time frame: From start of salvage hormone therapy to 12 years.
PSA Complete Response at End of Protocol Treatment
Complete response is defined as a drop in PSA on protocol treatment to less than 0.2 ng/ml. Note that when the study opened many institutions could not detect PSA \< 05 ng/ml.
Time frame: End of protocol treatment, which is planned to last for two years
Distant Failure (12-year Rates Reported)
Distant failure rates were estimated by the cumulative incidence method, with failure defined as the first occurrence of distant failure. Patients alive without distant metastases at time of analysis were censored. Death without distant metastasis was treated as a competing risk. Four-year follow-up was required of all patients, but twelve-year rates were reported. Patients are followed until death.
Time frame: From date of randomization to 12 years.
Prostate Cancer Death (12-year Rates Reported)
Prostate cancer death rates were estimated by the cumulative incidence method, with failure defined as death due to prostate cancer or complications of protocol treatment (centrally reviewed), death with known progressive metastatic disease while on salvage hormone therapy, or death with a known rising PSA while on salvage hormone therapy. Patients alive at time of analysis were censored. Any other death was treated as a competing risk. Four-year follow-up was required of all patients, but twelve-year rates were reported. Patients are followed until death. "Prostate cancer death" is a more accurate wording for the protocol endpoint of "disease-specific survival", and matches the protocol definition.
Time frame: From date of randomization to 12 years.
Progression-free Survival (12-year Rates Reported)
Progress-free survival rates were estimated by the Kaplan-Meier method, with failure defined as the first occurrence of PSA failure, local, regional or distant failure, or death from any cause. Patients alive without progression at time of analysis were censored. Four-year follow-up was required of all patients, but twelve-year rates were reported. Patients are followed until death. "Progression-free Survival" is more accurate wording for the protocol endpoint of "Freedom from Progression", and matches the protocol definition.
Time frame: From date of randomization to 12 years.
Grade 3+ Toxicity
Adverse events are graded using the Cooperative Group Common Toxicity Criteria and the Radiation Therapy Oncology Group (RTOG) Radiation Morbidity Scoring. Grade refers to severity, assigning Grades 1 through 5 based on this general guideline: Grade 0 None, Grade 1 Mild, Grade 2 Moderate, Grade 3 Severe, Grade 4 Life-threatening or disabling, Grade 5 Death related toxicity. Toxicities reported to have occurred within 90 days from the start of radiotherapy are reported as "Acute Radiotherapy", all later toxicities are reported as "Hormone therapy and late radiotherapy toxicity". The highest grade toxicity event per subject is counted within each of these time periods. Four-year follow-up was required of all patients; patients are followed until death.
Time frame: From date of randomization to four years.
| Milestone | Bicalutamide | Placebo |
|---|---|---|
| Started | 421 | 419 |
| Completed | 376 | 384 |
| Not completed | 45 | 35 |
| Withdrew: Withdrawal by subject | 1 | 1 |
| Withdrew: Protocol violation | 44 | 34 |
Overall survival rates were estimated by the Kaplan-Meier method, with failure defined as death by any cause. Four-year follow-up was required of all patients, twelve-year rates are reported. Four-year follow-up was required of all patients, but twelve-year rates were reported. Patients are followed until death.
| percentage of participants | Placebo | Bicalutamide |
|---|---|---|
| Overall Survival (12-year Rates Reported) | 71.3 (66.5 to 76.0) | 76.3 (71.9 to 80.8) |
Non-prostate cancer death rates were estimated by the cumulative incidence method, with failure defined as any death that does not fall into the following categories: death due to prostate cancer or complications of protocol treatment (centrally reviewed), death with known progressive metastatic disease while on salvage hormone therapy, or death with a known rising PSA while on salvage hormone therapy. All other deaths are considered competing risks. Patients alive at time of analysis were censored. Any other death was treated as a competing risk. Four-year follow-up was required of all patients, but twelve-year rates were reported. Patients are followed until death. "Non-Prostate cancer death" is a more accurate wording for the protocol endpoint of "non-disease-specific survival", and matches the protocol definition.
| percentage of participants | Placebo | Bicalutamide |
|---|---|---|
| Non-Prostate Cancer Death (12-year Rates Reported) | 15.3 (11.8 to 19.3) | 17.9 (14.0 to 22.1) |
Second PSA recurrence (SPSAR) rates (i.e. first PSA failure on study) were estimated by the cumulative incidence method, with failure defined as the first occurrence of one of the following events: 1. Increase in PSA following protocol treatment according to the following criteria met during protocol treatment: If PSA dropped to undetectable level (\<0.2 ng/ml) during protocol treatment (PT) then failure = increase after PT to \>= 0.5 ng/ml ; If PSA decreased to a detectable level (≥ 0.2 ng/ml) during PT, then failure = increase PT of \>= 0.3 ng/ml above the lowest detectable level; If PSA did not decrease during PT then failure = increase in PSA after PT of \>= 0.5 ng/ml above entry PSA level. 2. The start of salvage hormone therapy. Patients alive without SPSAR at time of analysis were censored. Death without SPSAR was treated as a competing risk. Four-year follow-up was required of all patients, but twelve-year rates were reported. Patients are followed until death.
| percentage of participants | Placebo | Bicalutamide |
|---|---|---|
| Second PSA Recurrence (12-year Rates Reported) | 67.9 (62.7 to 72.5) | 44.0 (38.8 to 49.1) |
Third PSA recurrence rates (i.e. second PSA failure on study) were estimated by the cumulative incidence method, with failure defined as PSA value of 0.5ng/ml or higher or any disease progression after starting salvage hormone therapy. Patients alive without third PSA recurrence at time of analysis were censored. Death without third PSA recurrence was treated as a competing risk. Four-year follow-up was required of all patients, but twelve-year rates were reported. Patients are followed until death.
| percentage of participants | Placebo | Bicalutamide |
|---|---|---|
| Third PSA Recurrence (12-year Rates Reported) | 80.7 (73.2 to 86.3) | 84.2 (75.0 to 90.3) |
Complete response is defined as a drop in PSA on protocol treatment to less than 0.2 ng/ml. Note that when the study opened many institutions could not detect PSA \< 05 ng/ml.
| Participants | Placebo | Bicalutamide |
|---|---|---|
| PSA Complete Response at End of Protocol Treatment | 259 | 360 |
Distant failure rates were estimated by the cumulative incidence method, with failure defined as the first occurrence of distant failure. Patients alive without distant metastases at time of analysis were censored. Death without distant metastasis was treated as a competing risk. Four-year follow-up was required of all patients, but twelve-year rates were reported. Patients are followed until death.
| percentage of participants | Placebo | Bicalutamide |
|---|---|---|
| Distant Failure (12-year Rates Reported) | 23.0 (18.8 to 27.5) | 14.5 (11.1 to 18.5) |
Prostate cancer death rates were estimated by the cumulative incidence method, with failure defined as death due to prostate cancer or complications of protocol treatment (centrally reviewed), death with known progressive metastatic disease while on salvage hormone therapy, or death with a known rising PSA while on salvage hormone therapy. Patients alive at time of analysis were censored. Any other death was treated as a competing risk. Four-year follow-up was required of all patients, but twelve-year rates were reported. Patients are followed until death. "Prostate cancer death" is a more accurate wording for the protocol endpoint of "disease-specific survival", and matches the protocol definition.
| percentage of participants | Placebo | Bicalutamide |
|---|---|---|
| Prostate Cancer Death (12-year Rates Reported) | 13.4 (10.1 to 17.2) | 5.8 (3.6 to 8.6) |
Progress-free survival rates were estimated by the Kaplan-Meier method, with failure defined as the first occurrence of PSA failure, local, regional or distant failure, or death from any cause. Patients alive without progression at time of analysis were censored. Four-year follow-up was required of all patients, but twelve-year rates were reported. Patients are followed until death. "Progression-free Survival" is more accurate wording for the protocol endpoint of "Freedom from Progression", and matches the protocol definition.
| percentage of participants | Placebo | Bicalutamide |
|---|---|---|
| Progression-free Survival (12-year Rates Reported) | 23.9 (19.4 to 28.4) | 38.8 (33.7 to 43.9) |
Adverse events are graded using the Cooperative Group Common Toxicity Criteria and the Radiation Therapy Oncology Group (RTOG) Radiation Morbidity Scoring. Grade refers to severity, assigning Grades 1 through 5 based on this general guideline: Grade 0 None, Grade 1 Mild, Grade 2 Moderate, Grade 3 Severe, Grade 4 Life-threatening or disabling, Grade 5 Death related toxicity. Toxicities reported to have occurred within 90 days from the start of radiotherapy are reported as "Acute Radiotherapy", all later toxicities are reported as "Hormone therapy and late radiotherapy toxicity". The highest grade toxicity event per subject is counted within each of these time periods. Four-year follow-up was required of all patients; patients are followed until death.
| participants | Placebo | Bicalutamide |
|---|---|---|
| Acute radiotherapy toxicity | 17 | 8 |
| Hormone therapy and late radiotherapy toxicity | 73 | 100 |
Non-serious events are listed at a 5% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| Placebo | — | 84/382 (22%) | 346/382 (90.6%) |
| Bicalutamide | — | 97/374 (25.9%) | 374/374 (100%) |
| Event | Placebo | Bicalutamide |
|---|---|---|
| Bladder/GU: NOSRenal and urinary disorders | 28/382 | 30/374 |
| Impotence: NOSReproductive system and breast disorders | 28/382 | 16/374 |
| Cardiac: NOSCardiac disorders | 18/382 | 6/374 |
| Other: NOSGeneral disorders | 16/382 | 16/374 |
| Acute RT Toxicity: Bladder: NOSRenal and urinary disorders | 4/382 | 11/374 |
| Bowel/GI: NOSGastrointestinal disorders | 10/382 | 8/374 |
| Neurologic: NOSNervous system disorders | 8/382 | 5/374 |
| Pain: NOSGeneral disorders | 2/382 | 6/374 |
| Hematologic: NOSBlood and lymphatic system disorders | 5/382 | 5/374 |
| Acute RT Toxicity: Bowel: NOSGastrointestinal disorders | 1/382 | 3/374 |
| Event | Placebo | Bicalutamide |
|---|---|---|
| Gynecomastia: NOSReproductive system and breast disorders | 266/382 | 42/374 |
| Acute RT Toxicity: Bowel: NOSGastrointestinal disorders | 232/382 | 235/374 |
| Bladder/GU: NOSRenal and urinary disorders | 232/382 | 222/374 |
| Bowel/GI: NOSGastrointestinal disorders | 192/382 | 168/374 |
| Acute RT Toxicity: Bladder: NOSRenal and urinary disorders | 188/382 | 165/374 |
| Other: NOSGeneral disorders | 129/382 | 100/374 |
| Acute RT Toxicity: Skin: NOSInjury, poisoning and procedural complications | 87/382 | 88/374 |
| Hot flashes: NOSVascular disorders | 83/382 | 67/374 |
| Acute RT Toxicity: Other: NOSGeneral disorders | 68/382 | 50/374 |
| Pain: NOSGeneral disorders | 54/382 | 65/374 |
Eligible patients who have not withdrawn
| Age, Continuous(years) | Bicalutamide | Placebo | Total |
|---|---|---|---|
| Median | 65 (45 to 81) | 65 (40 to 83) | 65 (40 to 83) |
| Sex: Female, Male(Participants) | Bicalutamide | Placebo | Total |
|---|---|---|---|
| Female | 0 | 0 | 0 |
| Male | 376 | 384 | 760 |
Showing the first 100 of 240 sites across 2 countries.
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