This study is a multicenter individual patient-based meta-analysis that will assess the performances of liver stiffness measurements performed with supersonic shear imaging shearwave elastography (SSI-SWE) in patients with liver fibrosis to predict progression of chronic liver disease.

Inclusion Criteria:

• Patients who had received a liver ultrasound exam at baseline for a suspected chronic fibrotic liver disease of viral and/or steatotic origin,
• Patients who had reached the age of majority in their countries, at baseline,
• Patients with a baseline liver biopsy for histological evaluation of liver fibrosis with a length ≥ 15 mm paraffin sections (except if cirrhosis),
• Patients for whom a minimum length of clinical follow-up from baseline of 1 year had been recorded

Exclusion Criteria:

• Cause of chronic liver disease other than viral, ALD or NAFLD ( hemochromatosis, autoimmune hepatitis, biliary tract disease intrahepatic...)
• Any systemic, viral hepatitis and HIV co-infection

Patients with suspected or confirmed chronic liver disease of viral and/or steatotic origin, requiring a percutaneous liver biopsy, and who had received a liver ultrasound exam at baseline for a suspected chronic fibrotic liver disease.

At the end of the study, sharing of IPD will not be required.