COntrolled MyeloFibrosis Study With ORal JAK Inhibitor Treatment: The COMFORT-I Trial

This study is ongoing, but not recruiting participants.
Sponsor:
Information provided by (Responsible Party):
Incyte Corporation
ClinicalTrials.gov Identifier:
NCT00952289
First received: August 4, 2009
Last updated: May 13, 2013
Last verified: May 2013
Results First Received: December 16, 2011  
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: Myelofibrosis
Interventions: Drug: Ruxolitinib
Drug: Placebo

  Participant Flow


  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.
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Reporting Groups
  Description
Ruxolitinib Participants began treatment with ruxolitinib 15 or 20 mg taken orally twice a day based on Baseline platelet count. The dose was adjusted by the Investigator based on efficacy and safety to a maximum of 25 mg twice daily.
Placebo Placebo tablets matching ruxolitinib administered orally twice a day at a starting dose based on Baseline platelet count. Doses were titrated using the same guidelines as for active drug. Patients meeting pre-specified requirements were given the opportunity to crossover to ruxolitinib treatment.
Total Total of all reporting groups

Baseline Measures
    Ruxolitinib     Placebo     Total  
Number of Participants  
[units: participants]
  155     154     309  
Age  
[units: years]
Mean ± Standard Deviation
  66.7  ± 8.82     68.7  ± 8.66     67.7  ± 8.78  
Gender [1]
[units: participants]
     
Female     76     65     141  
Male     79     88     167  
Race/Ethnicity, Customized [2]
[units: participants]
     
Black or African American     6     7     13  
White     138     139     277  
Asian     5     4     9  
Native Hawaiian or Other Pacific Islander     1     0     1  
Other     5     3     8  
Disease Subtype  
[units: participants]
     
Primary myelofibrosis     70     84     154  
Post-polycythemia vera-myelofibrosis     50     47     97  
Post-essential thrombocythemia-myelofibrosis     35     22     57  
Missing     0     1     1  
Spleen volume [3]
[units: cm˄3]
Mean ± Standard Deviation
  2745.7  ± 1247.0     2797.6  ± 1388.5     2771.5  ± 1317.3  
JAK2 V617F Mutation Status [4]
[units: participants]
     
Positive     113     123     236  
Negative     40     27     67  
Unknown/Missing     2     4     6  
[1] Gender data for one patient in the placebo arm was not available because of loss of study data during a move to a new location by the clinical site.
[2] Race data for one patient in the placebo arm was not available because of loss of study data during a move to a new location by the clinical site.
[3] Spleen volume was measured by magnetic resonance imaging or computed tomography scans. Data for one patient in the placebo arm was not available because of loss of study data during a move by the clinical site.
[4] JAK2V617F is a mutation in the pseudokinase domain of Janus Kinase 2 (JAK2) (at amino acid 617, valine to phenylalanine) that results in constitutive activation of JAK2. Mutation status was determined using a validated assay on bone marrow as well as peripheral blood.



  Outcome Measures
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1.  Primary:   Number of Participants Achieving ≥ 35% Reduction in Spleen Volume From Baseline to Week 24   [ Time Frame: Baseline and Week 24 ]

2.  Secondary:   Maintenance of a ≥ 35% Reduction From Baseline in Spleen Volume Among Patients Initially Randomized to Receive Ruxolitinib   [ Time Frame: Baseline Visit and every 12 weeks until the data cut-off date (up to 14 months). ]

3.  Secondary:   Duration of Maintenance of a ≥ 35% Reduction From Baseline in Spleen Volume Among Patients Initially Randomized to Receive Ruxolitinib   [ Time Frame: Baseline Visit and every 12 weeks until the data cut-off date (up to 14 months). ]

4.  Secondary:   Number of Participants With a ≥ 50% Reduction in Total Symptom Score From Baseline to Week 24   [ Time Frame: Baseline and Week 24. Baseline total score was the average of the daily total scores for the last 7 days prior to randomization. The Week 24 total score was the average of daily total scores from the 28 days prior to the Week 24 visit. ]

5.  Secondary:   Change From Baseline to Week 24 in Total Symptom Score   [ Time Frame: Baseline and Week 24. Baseline total score was the average of the daily total scores for the last 7 days prior to randomization. The Week 24 total score was the average of daily total scores from the 28 days prior to the Week 24 visit. ]

6.  Secondary:   Overall Survival   [ Time Frame: From randomization to the data cut-off date (up to 14 months). ]

7.  Secondary:   Overall Survival Time   [ Time Frame: From randomization to the data cut-off date (up to 14 months). ]

8.  Secondary:   Overall Survival - Extended Data   [ Time Frame: From randomization to 4 months after the data cut-off date (up to 18 months). ]

9.  Secondary:   Overall Survival Time - Extended Data   [ Time Frame: From randomization to 4 months after the data cut-off date (up to 18 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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