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Efficacy and safety of elbasvir/grazoprevir in participants with HCV genotype 1, 4, or 6 infection from the Asia-Pacific region and Russia: final results from the randomized C-CORAL study.
Journal of Gastroenterology and Hepatology 2018 October 13
BACKGROUND AND AIM: Although treatment with direct-acting antivirals has dramatically improved morbidity and mortality attributable to chronic hepatitis C virus infection, universal access to these medicines has been slow in the Asia-Pacific region and Russia. This study evaluated efficacy and safety of elbasvir/grazoprevir in participants with HCV infection from Asia-Pacific countries and Russia (C-CORAL).
METHODS: C-CORAL was a phase 3, randomized, placebo-controlled study. Treatment-naive, HIV-negative, cirrhotic and non-cirrhotic participants with chronic hepatitis C genotype 1, 4, or 6 infection were randomized to elbasvir 50 mg/grazoprevir 100 mg once daily for 12 weeks (immediate-treatment group) or placebo followed by deferred treatment with elbasvir/grazoprevir (deferred-treatment group). The primary efficacy outcome was sustained virologic response at 12 weeks, and the primary safety outcome was a comparison between the immediate-treatment group and placebo phase of the deferred-treatment group.
RESULTS: A total of 489 participants were randomized (immediate-treatment group, n = 366; deferred-treatment group, n = 123). Sustained virologic response at 12 weeks in the combined immediate/deferred-treatment groups was 94.4% (459/486; 95% confidence interval = 92.4-96.5%). Sustained virologic response at 12 weeks was 98.2% in participants with genotype 1b, 91.9% with genotype 1a, and 66.7% with genotype 6 infection. Similar rates of adverse events and drug-related adverse events were seen in the immediate-treatment group versus placebo phase of the deferred-treatment group (51.0% vs 50.4% and 21.4% vs 21.1%).
CONCLUSIONS: Elbasvir/grazoprevir for 12 weeks represents an effective and well-tolerated treatment option for treatment-naive people with genotype 1 infection from Asia-Pacific countries and Russia.
METHODS: C-CORAL was a phase 3, randomized, placebo-controlled study. Treatment-naive, HIV-negative, cirrhotic and non-cirrhotic participants with chronic hepatitis C genotype 1, 4, or 6 infection were randomized to elbasvir 50 mg/grazoprevir 100 mg once daily for 12 weeks (immediate-treatment group) or placebo followed by deferred treatment with elbasvir/grazoprevir (deferred-treatment group). The primary efficacy outcome was sustained virologic response at 12 weeks, and the primary safety outcome was a comparison between the immediate-treatment group and placebo phase of the deferred-treatment group.
RESULTS: A total of 489 participants were randomized (immediate-treatment group, n = 366; deferred-treatment group, n = 123). Sustained virologic response at 12 weeks in the combined immediate/deferred-treatment groups was 94.4% (459/486; 95% confidence interval = 92.4-96.5%). Sustained virologic response at 12 weeks was 98.2% in participants with genotype 1b, 91.9% with genotype 1a, and 66.7% with genotype 6 infection. Similar rates of adverse events and drug-related adverse events were seen in the immediate-treatment group versus placebo phase of the deferred-treatment group (51.0% vs 50.4% and 21.4% vs 21.1%).
CONCLUSIONS: Elbasvir/grazoprevir for 12 weeks represents an effective and well-tolerated treatment option for treatment-naive people with genotype 1 infection from Asia-Pacific countries and Russia.
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