Fig. 2. association between interleukin (IL)28B genotype and three-level treatment outcome in chronic hepatitis C virus patients. The rates of null virological response (NVR), relapse and sustained vi rological response (SVR) are shown. Odds ratios (OR) and 95% con fidence intervals are for IL28B CC vs. CT/TT genotypes, comparing SVR patients to relapsers and relapsers to NVR patients. The p value shown is for the effect of the IL28B CC genotype in a univariate lo gistic regression analysis.