Hepatitis C virus NS5A region mutation in chronic hepatitis C genotype 1 patients who are non-responders to two or more treatments and its relationship with response to a new treatment

Figure 4 Interaction between baseline viral load and viral variability in the interferon-sensitivity-determining region. A: Viral load ≤ 600000 IU/mL; B: Viral load > 600000 IU/mL. Comparisons between groups were made with the χ² test. SVR: Sustained virological response; NVR: No virological response.