Mortality of inactive hepatitis B virus carriers in Japan is similar to that of the general population.

Abstract

Data on the long-term outcomes of individuals with hepatitis B virus (HBV) infection who are hepatitis envelope antigen (HBeAg)-negative inactive carriers (ICs) are limited due to small numbers. We compared the long-term prognosis of well-defined ICs with that of age- and gender-matched general population controls. A total of 526 HBeAg-negative patients who demonstrated alanine aminotransferase (ALT) level ≤40U/L and HBV DNA level ≤4.3 log IU/ml at least three times within 1year after the start of follow-up were enrolled as ICs. Inactive carriers were divided into two groups: Group A (n=332), whose ALT level was ≤30U/L and HBV DNA level was ≤3.3 log IU/ml, and Group B (remaining patients, n=194). We determined the long-term prognosis of ICs and compared it with that of general population controls. We also analyzed factors associated with hepatitis B surface antigen (HBsAg) clearance and phase transition in ICs. There were no significant differences in hepatocellular carcinoma development or all-cause, liver-related, or non-liver-related mortality between Groups A and B. There was no significant difference in all-cause mortality between ICs and the general population. Low HBsAg level (≤3.0 log IU/ml) and the presence of fatty liver were associated with HBsAg clearance and high alpha-fetoprotein level was associated with phase transition. The long-term prognosis of well-defined ICs was similar to that of general population controls. In addition, the ICs had a high HBsAg clearance rate and low phase transition rate.