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© 2019 Gastroenterology & Hepatology Advanced Practice Providers

Age, race and viral genotype are associated with the prevalence of Hepatitis B e antigen in children and adults with chronic Hepatitis B

Abstract

Hepatitis B e antigen (HBeAg) is an important serological marker of hepatitis B virus (HBV) infection and is associated with higher levels of viremia, increased risk of infectivity to others and increased risk of hepatocellular carcinoma. We analyzed HBeAg status in a large cohort of adults and children enrolled in Cohort Studies of the Hepatitis B Research Network, long-term natural history studies of chronic HBV infection. A cross sectional analysis examined factors associated with HBeAg positivity, including demographic and virologic data, across the age spectrum. Among 2,241 enrolled participants who met criteria for this analysis, 825 (37%) were seropositive for HBeAg. The prevalence of HBeAg was lower in those with older age, ranging from 85% among up to 10 years of age to only 12% among those older than 50 years. In addition to age, both race and HBV genotype were independently associated with HBeAg positivity. There was a significant interaction between age and race; prevalence of HBeAg was significantly higher among Asians >10-30 years old vs. whites or blacks who were >10 to 30 years old, and those infected with HBV genotype C. Conversely, the presence of the basal core promoter and pre-core variants were associated with significantly lower prevalence of HBeAg, even when adjusted for age, race and genotype. These data will provide a better understanding of factors associated with seropositivity for HBeAg and may lead to better strategies for preventing HBV infection and broader indications for antiviral therapy.

Authors

Author Information

  1. Saint Louis University Liver Center, Saint Louis University.

  2. Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh.

  3. Washington University.

  4. University of California at San Francisco.

  5. Toronto Centre for Liver Disease, Toronto General Hospital, University of Toronto.

  6. Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases.

  7. Beth Israel, Deaconess Medical Center.

  8. University of Texas, Southwestern Medical Center.

  9. California Pacific Medical Center.

  10. Johns Hopkins University School of Medicine.

  11. Virginia Commonwealth University.