Analysis of Methylomic Features and Prognostic Risk Prediction in Patients With Hepatitis B-related Acute-on-chronic Liver Failure

Inclusion Criteria: * Chronic hepatitis B was persistent hepatitis B surface antigen (HBsAg) seropositivity for more than six months. Hepatitis B-related liver cirrhosis was diagnosed based on histological examination, typical features on ultrasound or radiological imaging, endoscopic findings of portal hypertension, and clinical history. Hepatitis B-related acute-on-chronic liver failure meets the diagnostic criteria of the 2018 Asia-Pacific guidelines for the diagnosis and treatment of liver failure.Laboratory tests:Jaundice: Serum total bilirubin ≥ 85 µmol/L and coagulopathy \[International Normalized Ratio (INR) ≥ 1.5 or Prothrombin Activity (PTA) \< 40%\]. Exclusion Criteria: * co-infection with other hepatitis viruses; history of hepatocellular carcinoma or other malignancies; concomitant autoimmune liver disease; or insufficient clinical data.