Figure 2.

On comparison according to disease stage, the prognosis in the NBNC group was significantly superior to that in the HCV group for stage II disease (P=0.04). The prognosis did not differ significantly between groups for stage I, III and IV disease. Continuous line, HCV; short dotted line, NBNC; and long dotted line, HBV. NBNC, hepatitis B surface antigen-negative and hepatitis C virus antibody-negative patients; HBV, hepatitis B surface antigen-positive patients; HCV, hepatitis C virus antibody-positive patients; NS, non-significant.