Randomized Study Comparing Docetaxel Plus Dasatinib to Docetaxel Plus Placebo in Castration-resistant Prostate Cancer (READY)

This study is ongoing, but not recruiting participants.
Sponsor:
Information provided by (Responsible Party):
Bristol-Myers Squibb
ClinicalTrials.gov Identifier:
NCT00744497
First received: August 29, 2008
Last updated: July 8, 2014
Last verified: July 2014
Results First Received: November 15, 2013  
Study Type: Interventional
Study Design: Allocation: Randomized;   Endpoint Classification: Safety/Efficacy Study;   Intervention Model: Parallel Assignment;   Masking: Double Blind (Subject, Investigator);   Primary Purpose: Treatment
Condition: Prostatic Neoplasms
Interventions: Drug: Placebo
Drug: Dasatinib
Drug: Docetaxel
Drug: Prednisone

  Participant Flow
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Recruitment Details
Key information relevant to the recruitment process for the overall study, such as dates of the recruitment period and locations
No text entered.

Pre-Assignment Details
Significant events and approaches for the overall study following participant enrollment, but prior to group assignment
A total of 1930 participants were enrolled, and 1522 were randomized to a treatment group; 1518 received at least 1 dose of dasatinib (761) or placebo (757).

Reporting Groups
  Description
Placebo Participants received placebo, given orally once daily, plus docetaxel, 75 mg/m^2, given intravenously every 3 weeks as a 1-hour infusion, plus prednisone, 5 mg, given orally twice daily
Dasatinib Participants received dasatinib, 100 mg, orally once daily plus docetaxel, 75 mg/m^2, given intravenously every 3 weeks as a 1-hour infusion, plus prednisone, 5 mg, given orally twice daily

Participant Flow:   Overall Study
    Placebo     Dasatinib  
STARTED     760 [1]   762 [1]
Received Treatment     757     761  
COMPLETED     43 [2]   39 [2]
NOT COMPLETED     717     723  
Withdrawal by Subject                 21                 17  
Death                 11                 7  
Lost to Follow-up                 4                 2  
Poor compliance/noncompliance                 9                 4  
No longer meets study criteria                 7                 3  
Disease progression                 307                 208  
Study drug toxicity                 68                 140  
Adverse event unrelated to study drug                 77                 122  
Patient requested to stop study drug                 64                 72  
Maximum clinical benefit                 141                 138  
Other                 8                 10  
[1] Randomized
[2] Remained on study drug



  Baseline Characteristics


  Outcome Measures
  Show All Outcome Measures

1.  Primary:   Overall Survival: Time From Randomization to Date of Death   [ Time Frame: From randomization to death or date of last contact (maximum reached: 45 months) ]

2.  Secondary:   Percentage of Participants With an Objective Tumor Response by Modified Response Evaluation Criteria in Solid Tumors (RECIST)   [ Time Frame: At baseline and every 12 weeks thereafter to end of treatment, at end of treatment, and at follow-up (within 42 days of end of dosing) ]

3.  Secondary:   Time to First Skeletal-related Event (SRE)   [ Time Frame: From day of randomization to date of first SRE or to last SRE assessment, if subsequent cancer therapy begun or no SRE (maximum reached: 42 months) ]

4.  Secondary:   Percentage of Participants With A Reduction in Urinary N-telopeptide (uNTx) Level From Baseline   [ Time Frame: At baseline, prior to each docetaxel infusion (every 3 weeks) to end of treatment, at end of treatment, and at follow-up (within 14 days of end of dosing) ]

5.  Secondary:   Progression-free Survival (PFS)   [ Time Frame: From day of randomization to disease progression or death (or to last clinical assessment, if subsequent cancer therapy started or no progression or death) (maximum reached: approximately 43 months) ]

6.  Secondary:   Time to Prostate Specific Antigen (PSA) Progression   [ Time Frame: From randomization to date of first PSA measurement leading to confirmed PSA progression (or to last bone scan assessment, if no progression or if cancer therapy started) (maximum reached: 30 months) ]
  Hide Outcome Measure 6

Measure Type Secondary
Measure Title Time to Prostate Specific Antigen (PSA) Progression
Measure Description PSA progression is defined as the time from randomization to the date of the first PSA level measurement that led to confirmed PSA progression, for participants who had not started subsequent cancer therapy. For participants who did not progress or who progressed on cancer therapy, PSA progression is defined as the time from randomization to the date of the last PSA level measurement before the start of cancer therapy, if any. Participants who had no on-study PSA level measurements were censored on the day they were randomized.
Time Frame From randomization to date of first PSA measurement leading to confirmed PSA progression (or to last bone scan assessment, if no progression or if cancer therapy started) (maximum reached: 30 months)  
Safety Issue No  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
All participants who were randomized to receive any treatment

Reporting Groups
  Description
Placebo Participants received placebo, given orally once daily, plus docetaxel, 75 mg/m^2, given intravenously every 3 weeks as a 1-hour infusion, plus prednisone, 5 mg, given orally twice daily
Dasatinib Participants received dasatinib, 100 mg, orally once daily plus docetaxel, 75 mg/m^2, given intravenously every 3 weeks as a 1-hour infusion, plus prednisone, 5 mg, given orally twice daily

Measured Values
    Placebo     Dasatinib  
Number of Participants Analyzed  
[units: participants]
  760     762  
Time to Prostate Specific Antigen (PSA) Progression  
[units: Months]
Median ( 95% Confidence Interval )
  6.9  
  ( 6.5 to 7.4 )  
  7.2  
  ( 6.6 to 7.9 )  


Statistical Analysis 1 for Time to Prostate Specific Antigen (PSA) Progression
Groups [1] All groups
Hazard Ratio (HR) [2] 0.89
95% Confidence Interval ( 0.79 to 1.01 )
[1] Additional details about the analysis, such as null hypothesis and power calculation:
  Since superiority of the dasatinib treatment group was not demonstrated for Overall Survival, secondary endpoints were not tested. The hazard ratio is presented for of experimental to control group.
[2] Other relevant estimation information:
  No text entered.



7.  Secondary:   Percentage of Participants With a Reduction in Pain Intensity From Baseline   [ Time Frame: At baseline, prior to each docetaxel infusion (every 3 weeks), at end of treatment, and at follow-up (within 14 days of end of dosing) ]

8.  Other Pre-specified:   Number of Participants With Death as Outcome, Serious Adverse Events (SAEs), Drug-related SAEs, Adverse Events (AEs) Leading to Discontinuation, and Drug-related AEs Leading to Discontinuation   [ Time Frame: Continuously throughout study to >=30 days after last dose of study drug until resolution of drug-related toxicity, or when toxicity was deemed irreversible, whichever shorter. ]

9.  Other Pre-specified:   Number of Participants With Adverse Events (AEs) of Special Interest   [ Time Frame: Continuously throughout study to >=30 days after last dose of study drug until resolution of drug-related toxicity, or when toxicity was deemed irreversible, whichever was shorter ]

10.  Other Pre-specified:   Number of Participants With Abnormalities in Results of Clinical Laboratory Tests in Hematology   [ Time Frame: At baseline, within 3 days prior to each infusion of docetaxel (each cycle) and at end of treatment. If docetaxel is discontinued, every other cycle. ]

11.  Other Pre-specified:   Number of Participants With Abnormalities in Results of Clinical Laboratory Tests Assessing Liver Function, Renal Function, and Electrolytes   [ Time Frame: At baseline, within 3 days prior to each infusion of docetaxel (each cycle), to end of treatment. If docetaxel is discontinued, every other cycle. ]

12.  Other Pre-specified:   Number of Participants With Abnormal Results in Urinalysis   [ Time Frame: At baseline, within 3 days prior to each infusion of docetaxel (each cycle), to end of treatment. If docetaxel is discontinued, every other cycle. ]

13.  Other Pre-specified:   Number of Participants by Maximal On-study Fridericia-corrected QTc Interval by Electrocardiogram   [ Time Frame: At baseline, approximately 12 weeks after starting treatment, and then whenever clinically indicated up to within 30 days of end of dosing ]

14.  Other Pre-specified:   Number of Participants With Changes From Baseline in Fridericia-corrected QTc Interval by Electrocardiogram   [ Time Frame: At baseline, approximately 12 weeks after starting treatment, and then whenever clinically indicated up to within 30 days of end of dosing ]

15.  Other Pre-specified:   Number of Participants With and Without Pericardial Effusion at Baseline and On-study and With Left Ventricular Ejection Fraction (LVEF) <40% and >=40%On-study by Echocardiogram   [ Time Frame: At baseline, approximately 12 weeks after start of treatment, and thereafter whenever clinically indicated ]


  Serious Adverse Events


  Other Adverse Events


  Limitations and Caveats
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Limitations of the study, such as early termination leading to small numbers of participants analyzed and technical problems with measurement leading to unreliable or uninterpretable data
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  More Information