Sofosbuvir-based treatment regimens for chronic, genotype 1 hepatitis C virus infection in U.S. incarcerated populations: a cost-effectiveness analysis.

BACKGROUND

Prevalence of chronic hepatitis C virus (HCV) infection is high among incarcerated persons in the United States. New, short-duration, high-efficacy therapies may expand treatment eligibility in this population.

OBJECTIVE

To assess the cost-effectiveness of sofosbuvir for HCV treatment in incarcerated populations.

DESIGN

Markov model.

DATA SOURCES: Published literature and expert opinion.

TARGET POPULATION: Treatment-naive men with chronic, genotype 1 HCV monoinfection.

TIME HORIZON: Lifetime.

PERSPECTIVE: Societal.

INTERVENTION: No treatment, 2-drug therapy (pegylated interferon and ribavirin), or 3-drug therapy with either boceprevir or sofosbuvir. For inmates with short remaining sentences (<1.5 years), only no treatment or sofosbuvir 3-drug therapy was feasible; for those with long sentences (≥1.5 years; mean, 10 years), all strategies were considered. After release, eligible persons could receive sofosbuvir 3-drug therapy.

OUTCOME MEASURES: Discounted costs (in 2013 U.S. dollars), discounted quality-adjusted life-years (QALYs), and incremental cost-effectiveness ratios.

RESULTS OF BASE-CASE ANALYSIS: The strategies yielded 13.12, 13.57, 14.43, and 15.18 QALYs, respectively, for persons with long sentences. Sofosbuvir produced the largest absolute reductions in decompensated cirrhosis (16%) and hepatocellular carcinoma (9%), resulting in 2.1 additional QALYs at an added cost exceeding $54,000 compared with no treatment. For persons with short sentences, sofosbuvir cost $25,700 per QALY gained compared with no treatment; for those with long sentences, it dominated other treatments, costing $28,800 per QALY gained compared with no treatment.

RESULTS OF SENSITIVITY ANALYSIS: High reinfection rates in prison attenuated cost-effectiveness for persons with long sentences.

LIMITATIONS: Data on sofosbuvir's long-term effectiveness and price are limited. The analysis did not consider women, Hispanic persons, or patients co-infected with HIV or hepatitis B virus.

CONCLUSION

Sofosbuvir-based treatment is cost-effective for incarcerated persons, but affordability is an important consideration.

PRIMARY FUNDING SOURCE: National Institutes of Health.