Simplified Autoimmune Hepatitis (AIH) Score

Classifies probable vs definite autoimmune hepatitis from autoantibodies, IgG, liver histology, and exclusion of viral hepatitis; a diagnostic-support score, not a standalone diagnosis — use with the full clinical picture and specialist judgment.

Autoantibodies (highest single tier — NOT additive across antibodies)

Serum IgG (or gamma-globulin)

Liver histology (presence of hepatitis is required to score above 0)

Absence of viral hepatitis