Report

Interferon alfa (pegylated and non-pegylated) and ribavirin for the treatment of mild chronic hepatitis C: a systematic review and economic evaluation

Authors: Shepherd J, Jones J, Hartwell D, Davidson P, Price A, Waugh N

Journal: Health Technology Assessment Volume: 11 Issue: 11

Publication date: April 2007

DOI: 10.3310/hta11110

Citation:

Shepherd J, Jones J, Hartwell D, Davidson P, Price A, Waugh N.Interferon alfa (pegylated and non-pegylated) and ribavirin for the treatment of mild chronic hepatitis C: a systematic review and economic evaluation. Health Technol Assess 2007;11(11)


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  • Abstract

Abstract

Objectives

To assess the clinical effectiveness and cost-effectiveness of pegylated interferon alpha (PEG) and non-pegylated interferon alpha (IFN) and ribavirin (RBV) for the treatment of adults with histologically mild chronic hepatitis C (HCV) infection.

Data sources

Electronic bibliographic databases were searched up to July 2005.

Review methods

A systematic review and an economic evaluation were carried out. A Markov state transition model was developed to estimate the cost-effectiveness of treatment strategies for adults with mild chronic HCV.

Results

Among the included studies, eight randomised controlled trials (RCTs) of antiviral treatment in mild HCV were identified and included. In general these RCTs were of good quality. The results suggested that effectiveness, particularly with respect to sustained virological response was similar in patients with mild disease to the results obtained in patients with moderate/severe disease. This finding was supported by RCTs reporting the results for mild HCV sub-groups. The authors' cost-effectiveness analysis showed that early treatment compared with watchful waiting is associated with quality-adjusted life-year (QALY) gains but with increased treatment costs. The base-case incremental costs per QALY for 48 weeks of treatment are: watchful waiting with IFN + RBV versus best supportive care = pound 3097-6585; early treatment with IFN + RBV versus watchful waiting with IFN + RBV = pound 5043-8092; watchful waiting with PEG 2a + RBV versus best supportive care = pound 3052; early treatment with PEG 2a + RBV versus watchful waiting with PEG 2a + RBV = pound 5900; watchful waiting with PEG 2b + RBV versus best supportive care = pound 2534; and early treatment with PEG 2b + RBV versus watchful waiting with PEG 2b + RBV = pound 5774. These results were consistent with previous assessments of cost-effectiveness.

Conclusion

This systematic review and economic evaluation show that patients with histologically mild HCV can be successfully treated with both pegylated and non-pegylated interferon alpha. Early treatment and watchful waiting strategies are associated with acceptable cost-per-QALY estimates. Research needs to be directed towards newer, potentially more effective interventions, particularly those that improve treatment response in patients with genotype 1, with minimal adverse effects. Further research is required into the natural history of HCV to estimate better the rate of liver disease progression, and also into the effectiveness of non-invasive biochemical markers of liver disease, as an alternative to liver biopsy.

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