Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

236 questions · 243 findings · 22 reviews · Headline outcomes only

No studies found 35 · 14.4%GRADE not reported 9 · 3.7%Very low 50 · 20.6%Low 71 · 29.2%Moderate 65 · 26.7%High 13 · 5.3%

Peginterferon alpha‐2a vs peginterferon alpha‐2b

All‐cause mortality Deaths during and after the treatment · people with chronic hepatitis C

It is very uncertain whether peginterferon alpha‐2a changes all‐cause mortality Deaths during and after the treatment compared with peginterferon alpha‐2b (very low certainty).

1 finding from 1 review

Peginterferon alpha‐2a vs peginterferon alpha‐2b

Discontinuation of medication due to adverse events · people with chronic hepatitis C

Peginterferon alpha‐2a showed no clear difference in adverse events leading to treatment discontinuation Number of events compared with peginterferon alpha‐2b (low certainty).

1 finding from 1 review

Peginterferon plus ribavirin vs non‐pegylated interferon plus ribavirin

All‐cause mortality or liver‐related morbidity · people with chronic hepatitis C

Peginterferon plus ribavirin showed no clear difference in liver‐related morbidity plus all‐cause mortality compared with non‐pegylated interferon plus ribavirin (low certainty).

1 finding from 1 review