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Metabolic Effects of Switching Kaletra to Boosted Reyataz

This study has been completed.
Sponsor:
Collaborator:
Bristol-Myers Squibb
Information provided by:
Massachusetts General Hospital
ClinicalTrials.gov Identifier:
NCT00413153
First received: December 15, 2006
Last updated: March 5, 2010
Last verified: March 2010
Results First Received: November 4, 2009  
Study Type: Interventional
Study Design: Allocation: Randomized;   Endpoint Classification: Safety/Efficacy Study;   Intervention Model: Parallel Assignment;   Masking: Open Label;   Primary Purpose: Treatment
Condition: HIV Infections
Interventions: Drug: atazanavir/ritonavir
Drug: lopinavir/ritonavir

  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
Subjects were recruited through information given to HIV-care providers, postings in HIV-community organizations, newspaper advertisements, and the Massachusetts General Hospital research patient data registry. Recruitment began in March, 2006, and continued through May, 2008.

Pre-Assignment Details
Significant events and approaches for the overall study following participant enrollment, but prior to group assignment
After screening visit to determine eligibility, subjects were asked to continue their current antiretroviral medications until the baseline visit, immediately after which they were randomized to continue lopinavir/ritonavir or switch to atazanavir/ritonavir.

Reporting Groups
  Description
Boosted Reyataz (ATV/r) Boosted Reyataz (300mg atazanavir + 100mg ritonavir)
Continue Kaletra (LPV/r) Kaletra (pre-study dose)

Participant Flow:   Overall Study
    Boosted Reyataz (ATV/r)     Continue Kaletra (LPV/r)  
STARTED     7     8  
COMPLETED     5     7  
NOT COMPLETED     2     1  
Withdrawal by Subject                 1                 1  
Adverse Event                 1                 0  



  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
Boosted Reyataz (ATV/r) Boosted Reyataz (300mg atazanavir + 100mg ritonavir)
Continue Kaletra (LPV/r) Kaletra (pre-study dose)
Total Total of all reporting groups

Baseline Measures
    Boosted Reyataz (ATV/r)     Continue Kaletra (LPV/r)     Total  
Number of Participants  
[units: participants]
  7     8     15  
Age  
[units: participants]
     
<=18 years     0     0     0  
Between 18 and 65 years     7     8     15  
>=65 years     0     0     0  
Age  
[units: years]
Mean ± Standard Deviation
  46  ± 8     50  ± 6     48  ± 7  
Gender  
[units: participants]
     
Female     2     1     3  
Male     5     7     12  
Region of Enrollment  
[units: participants]
     
United States     7     8     15  



  Outcome Measures
  Show All Outcome Measures

1.  Primary:   Glucose Trafficking   [ Time Frame: 6 months ]

2.  Secondary:   Insulin Sensitivity   [ Time Frame: 6 months ]

3.  Secondary:   Fasting Glucose   [ Time Frame: 6 months ]

4.  Secondary:   Lipid Metabolism - Serum Triglyceride   [ Time Frame: 6 months ]

5.  Secondary:   Body Composition - Visceral Adipose Tissue   [ Time Frame: 6 months ]

6.  Secondary:   Immune Parameters -- CD4 Count   [ Time Frame: 6 months ]
  Hide Outcome Measure 6

Measure Type Secondary
Measure Title Immune Parameters -- CD4 Count
Measure Description 6 month mean and standard deviation for CD4+ count.
Time Frame 6 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.
Repeated measures analysis using all available data points for each participant

Reporting Groups
  Description
Boosted Reyataz (ATV/r) Boosted Reyataz (300mg atazanavir + 100mg ritonavir)
Continue Kaletra (LPV/r) Kaletra (pre-study dose)

Measured Values
    Boosted Reyataz (ATV/r)     Continue Kaletra (LPV/r)  
Number of Participants Analyzed  
[units: participants]
  5     7  
Immune Parameters -- CD4 Count  
[units: cells/microL]
Mean ± Standard Deviation
  432  ± 192     688  ± 230  


Statistical Analysis 1 for Immune Parameters -- CD4 Count
Groups [1] All groups
Method [2] Repeated Measures ANCOVA
P Value [3] 0.72
[1] Additional details about the analysis, such as null hypothesis and power calculation:
  Repeated measures ANCOVA, controlling for baseline values, used to assess treatment effect of the randomization over 6 months (net difference over time between ATV/r vs.LPV/r).
[2] Other relevant method information, such as adjustments or degrees of freedom:
  No text entered.
[3] Additional information, such as whether or not the p-value is adjusted for multiple comparisons and the a priori threshold for statistical significance:
  No text entered.



7.  Secondary:   Liver Enzymes -- Aspartate Aminotransferase (AST)   [ Time Frame: 6 months ]

8.  Secondary:   Liver Enzymes -- Alanine Aminotransferase (ALT)   [ Time Frame: 6 months ]

9.  Secondary:   Total Bilirubin   [ Time Frame: 6 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
No text entered.


  More Information