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A Study to Evaluate the Safety and Efficacy of Bevacizumab in Combination With Chemotherapy in Previously Treated Metastatic Breast Cancer (RIBBON 2)

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
Genentech, Inc.
ClinicalTrials.gov Identifier:
NCT00281697
First received: January 23, 2006
Last updated: July 5, 2013
Last verified: July 2013
Results First Received: August 23, 2012  
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: Metastatic Breast Cancer
Interventions: Drug: Bevacizumab
Drug: Placebo
Drug: Standard chemotherapy

  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
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Pre-Assignment Details
Significant events and approaches for the overall study following participant enrollment, but prior to group assignment
No text entered.

Reporting Groups
  Description
Standard Chemotherapy + Bevacizumab Patients received one of several standard chemotherapies for metastatic breast cancer plus bevacizumab in a dose of either 10 mg/kg intravenously (IV) every 2 weeks or 15 mg/kg IV every 3 weeks depending upon the schedule of chemotherapy chosen.
Standard Chemotherapy + Placebo Patients received one of several standard chemotherapies for metastatic breast cancer plus placebo to bevacizumab administered IV either every 2 weeks or every 3 weeks depending upon the schedule of chemotherapy chosen.

Participant Flow:   Overall Study
    Standard Chemotherapy + Bevacizumab     Standard Chemotherapy + Placebo  
STARTED     459     225  
COMPLETED     58     28  
NOT COMPLETED     401     197  
> 60 days since last dose of study drug                 4                 4  
Adverse Event                 54                 15  
Death                 8                 3  
Disease progression                 279                 149  
Not specified                 5                 6  
Physician's decision to withdraw                 15                 12  
Subject/guardian's decision to withdraw                 33                 6  
Did not receive study drug                 3                 2  



  Baseline Characteristics
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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.
No text entered.

Reporting Groups
  Description
Standard Chemotherapy + Bevacizumab Patients received one of several standard chemotherapies for metastatic breast cancer plus bevacizumab in a dose of either 10 mg/kg intravenously (IV) every 2 weeks or 15 mg/kg IV every 3 weeks depending upon the schedule of chemotherapy chosen.
Standard Chemotherapy + Placebo Patients received one of several standard chemotherapies for metastatic breast cancer plus placebo to bevacizumab administered IV either every 2 weeks or every 3 weeks depending upon the schedule of chemotherapy chosen.
Total Total of all reporting groups

Baseline Measures
    Standard Chemotherapy + Bevacizumab     Standard Chemotherapy + Placebo     Total  
Number of Participants  
[units: participants]
  459     225     684  
Age  
[units: years]
Mean ± Standard Deviation
  55.6  ± 11.0     55.0  ± 11.2     55.4  ± 11.1  
Gender  
[units: participants]
     
Female     457     225     682  
Male     2     0     2  



  Outcome Measures
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1.  Primary:   Progression-free Survival   [ Time Frame: Baseline to data cut-off for analysis of the primary Outcome Measure (up to 3 years, 2 months) ]
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Measure Type Primary
Measure Title Progression-free Survival
Measure Description PFS was defined as the time from randomization to first documented disease progression (PD) as determined by the investigator using Response Evaluation Criteria in Solid Tumors (RECIST) or death due to any cause, whichever occurred first. For target lesions, PD was defined as at least a 20% increase in the sum of the longest diameter of target lesions, taking as reference the smallest sum of the longest diameter recorded since treatment started or the appearance of 1 or more new lesions. For non-target lesions, PD was defined as the appearance of 1 or more new lesions and/or unequivocal progression of existing non-target lesions. Target lesions should be selected on the basis of their size (those with the longest diameter) and their suitability for accurate repeated measurements by imaging techniques or clinically. All measurable lesions up to a maximum of 5 lesions per organ and 10 lesions in total, representative of all involved organs, should be identified as target lesions.
Time Frame Baseline to data cut-off for analysis of the primary Outcome Measure (up to 3 years, 2 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.
Intent-to-treat population: All randomized patients, regardless of whether they received any study drug or completed the full course of treatment.

Reporting Groups
  Description
Standard Chemotherapy + Bevacizumab Patients received one of several standard chemotherapies for metastatic breast cancer plus bevacizumab in a dose of either 10 mg/kg intravenously (IV) every 2 weeks or 15 mg/kg IV every 3 weeks depending upon the schedule of chemotherapy chosen.
Standard Chemotherapy + Placebo Patients received one of several standard chemotherapies for metastatic breast cancer plus placebo to bevacizumab administered IV either every 2 weeks or every 3 weeks depending upon the schedule of chemotherapy chosen.

Measured Values
    Standard Chemotherapy + Bevacizumab     Standard Chemotherapy + Placebo  
Number of Participants Analyzed  
[units: participants]
  459     225  
Progression-free Survival  
[units: Months]
Median ( 95% Confidence Interval )
  7.2  
  ( 6.5 to 7.6 )  
  5.1  
  ( 4.1 to 6.0 )  

No statistical analysis provided for Progression-free Survival



2.  Secondary:   Progression-free Survival Within Individual Standard Chemotherapy Cohorts (Taxanes, Gemcitabine, Capecitabine, and Vinorelbine)   [ Time Frame: Baseline to data cut-off for analysis of the primary Outcome Measure (up to 3 years, 2 months) ]

3.  Secondary:   Overall Survival   [ Time Frame: Baseline to the end of the study (up to 6 years, 7 months) ]

4.  Secondary:   One-year Survival   [ Time Frame: Baseline to the end of the study (up to 6 years, 7 months) ]

5.  Secondary:   Objective Response   [ Time Frame: Baseline to data cut-off for analysis of the primary Outcome Measure (up to 3 years, 2 months) ]

6.  Secondary:   Duration of Objective Response   [ Time Frame: Baseline to data cut-off for analysis of the primary Outcome Measure (up to 3 years, 2 months) ]


  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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