Abstract
OBJECTIVES
To evaluate the comparative effectiveness of antiviral drugs in adults with chronic hepatitis B monoinfection for evidence-based decision-making.
METHODS
A systematic review of randomized controlled clinical trials (RCTs) published in English. Results after interferon and nucleos(t)ides analog therapies were synthesized with random-effects meta-analyses and number needed to treat (NNT).
RESULTS
Despite sustained improvements in selected biomarkers, no one drug regimen improved all intermediate outcomes. In 16 underpowered RCTs, drug treatments did not reduce mortality, liver cancer, or cirrhosis. Sustained HBV DNA clearance was achieved in one patient when two were treated with adefovir (NNT from 1 RCT = 2 95%CI 1;2) or interferon alfa-2b (NNT from 2 RCTs = 2 95%CI 2;4), 13 with lamivudine (NNT from 1 RCT = 13 95%CI 7;1000), and 11 with peginterferon alfa-2a vs. lamivudine (NNT from 1 RCT = 11 95%CI 7;25). Sustained HBeAg seroconversion was achieved in one patient when eight were treated with interferon alfa-2b (NNT from 2 RCTs = 8 95%CI 5;33) or 10—with peginterferon alfa-2b vs. interferon alfa-2b (NNT from 1 RCT = 10 95%CI 5;1000). Greater benefits and safety after entecavir vs. lamivudine or pegylated interferon alfa-2b vs. interferon alfa-2b require future investigation of clinical outcomes. Adverse events were common and more frequent after interferon. Treatment utilization for adverse effects is unknown.
CONCLUSIONS
Individual clinical decisions should rely on comparative effectiveness and absolute rates of intermediate outcomes and adverse events. Future research should clarify the relationship of intermediate and clinical outcomes and cost-effectiveness of drugs for evidence-based policy and clinical decisions.
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Acknowledgements
We would like to thank AHRQ Task Order Officer Shilpa Amin, MD, MBSC for her guidance throughout the project. We also want to thank librarians Judith Stanke and Dr. Del Reed for their contributions to the literature search; Maureen Carlyle and Marilyn Eells for their excellent technical assistance in preparation of the full evidence report and this manuscript; Rebecca Schultz for her assistance in formatting the tables, and Nancy Russell, MLS for her assistance with proofreading the manuscript.
Grant Support
This project was funded under Contract No. 290-02-0009 from the Agency for Healthcare Research and Quality, U.S. Department of Health and Human Services. The authors of this report are responsible for its content. Statements in the paper should not be construed as endorsement by the Agency for Healthcare Research and Quality or the U.S. Department of Health and Human Services.
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Corporate names, city, and state of manufacturers of brand-name materials
STATA software (The Statistics/Data Analysis StataCorp. Stata statistical software: Release 9.2. College Station, Texas, USA)
Adefovir (Hepsera, Gilead Sciences, Foster City, California)
Entecavir (Baraclude, Bristol-Myers Squibb, New York)
Interferon Alfa 2b (Intron A, Schering-Plough, Milan, Italy)
Interferon Alfa 2b (Intron A, Schering Plough, Kenilworth, New Jersey)
Interferon Alfa 2b (Intron A, Shering-Plough, Athens, Greece)
Interferon Alfa 2b (Intron A, Scherag, South Africa)
Interferon Alfa 2b (Schering-Plough, Shanghai, China)
Interferon Alfa 2b (Intron A, Essex, Switzerland)
Lamivudine (Glaxo Wellcome, Suzhou, China)
Lamivudine (Zeffix, GlaxoSmithKline, Greenford, United Kingdom)
Lamivudine (Epivir-HBV Glaxo-Wellcome Inc, Research Triangle Park, North Carolina)
Lamivudine (GSK, Athens, Greece)
Lamivudine (Zeffix, GlaxoSmithKline, Middlesex, UK)
Peginterferon alfa-2a (PEGASYS, F. Hoffmann-La Roche Ltd., Basel, Switzerland)
Peginterferon alfa-2b (PegIntron, Schering-Plough Corp., Kenilworth, New Jersey)
Telbivudine Idenix Pharmaceuticals Inc. (Cambridge, Massachusetts)
Tenofovir DF Gilead Sciences
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Online Appendix 1
Pooled analysis used to calculate number needed to treat (1/pooled absolute risk difference) and number of attributable per 1000 events (1000*pooled absolute risk difference) (DOC 596 kb)
Online Appendix 2
Rates (%) of the most common (>10%) adverse effects after antiviral drugs in adults with chronic hepatitis B (Pooled with random effect models from randomized controlled clinical trials) (DOC 109 kb)
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Shamliyan, T.A., Johnson, J.R., MacDonald, R. et al. Systematic Review of the Literature on Comparative Effectiveness of Antiviral Treatments for Chronic Hepatitis B Infection. J GEN INTERN MED 26, 326–339 (2011). https://doi.org/10.1007/s11606-010-1569-5
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DOI: https://doi.org/10.1007/s11606-010-1569-5