NOX4 and fibrosis: No associations were found between the genotype frequencies of NOX4 rs3017887 (CC versus CA + AA) and CYBA −675 T → A (TT versus TA + AA) SNPs and inflammation scores (OR: 0.99; 95% CI: 0.45 to 2.14; P = 0.97 and OR: 0.99; 95% CI: 0.33 to 2.75; P = 0.99, for NOX4 and CYBA, respectively) or fibrosis stages (Table 2) in the overall population and in the population stratified by sex or by HCV genotypes.