This is a prospective/retrospective, observational follow-up study of effects of fatty liver on chronic hepatitis B. Patients will join this study who undergo transient elastography with liver stiffness (LS) and CAP measurements or Ultrasonic examination. All recruited subjects will undergo comprehensive clinical, anthropometric and laboratory assessments at the time when transient elastography or Ultrasonic examination is performed. We plan to compare the relationship between chronic hepatitis B and non-alcoholic fatty liver disease. Patients will be divided into several groups based on the demand.

Inclusion Criteria: age > 18 years, chronic hepatitis B patients -

Exclusion Criteria: patients with chronic hepatitis C or D and human immunodeficiency virus co-infection, excessive alcohol intake (≥30 g/d for men, ≥20 g/d for women), other chronic liver diseases (e.g. primary biliary cholangitis, primary sclerosing cholangitis, autoimmune hepatitis, Wilson's disease), or on medications known to induce hepatic steatosis (including corticosteroids, methotrexate, and tamoxifen), and pregnancy.

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age > 18 years chronic hepatitis B patients