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News

Noncompliance with guidelines for the treatment of hepatitis C is frequent in daily practice

The latest issue of the European Journal of Gastroenterology & Hepatology investigates noncompliance with guidelines for the treatment of hepatitis C in daily practice.

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In trials of pegylated interferons (PEG-IFNs), the lack of an early virological response (EVR) was associated with sustained virological response (SVR) rates of only 0-3%.

The rates were similarly low when hepatitis C virus (HCV)-RNA was positive at week 24.

Treatment guidelines therefore recommend 'stop rules' on the basis of HCV-RNA levels at weeks 12 and 24 of treatment.

Dr Niederau and colleagues analyzed the use of these rules under 'real-life' conditions.

The researchers performed a prospective, community-based cohort study involving 467 physicians from institutions throughout Germany, including 4727 treatment-naive genotype-1 patients who received a full course of treatment with PEG-IFN α-2a plus ribavirin between 2003 and 2009.

The overall SVR rate was 43%.

The research team noted that failure to determine EVR decreased from 20% in 2003-2004 to 10% in 2006-2007.

Unexpectedly, treatment was continued in 86% of patients without an EVR, and in those who had an EVR but were HCV-RNA positive at week 24, resulting in SVR rates of 16 and 41%, respectively.

Between 78 and 95% of physicians did not follow prescribed recommendations to reduce PEG-IFN or ribavirin in cases of hematological abnormalities.

Although recommendations to assess EVR and HCV-RNA at week 24 were increasingly observed in daily practice, the corresponding 'stop rules' in nonresponders were neglected.

The team found that subsequent SVR was 5-10 times higher than that reported in controlled trials.

This may partly be because of the fact that reductions in PEG-IFN or ribavirin dose were not performed despite recommendations.

The issue of stop rules will gain even more interest since the first HCV protease inhibitors have been approved.

Dr Niederau's team concludes, "Prolongation of treatment beyond the new stop rules is associated with risks of resistant HCV variants."

"Thus, the new stop rules are to be observed more strictly when compared with previous therapy with interferons and ribavirin."

Eur J Gastroenterol Hepatol. 2014: (1): 65-73
18 December 2013

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