The FIB-4 index is a biomarker of advanced hepatic fibrosis in a context of fatty liver disease. The calculation of the FIB-4 index requires of age, serum ALT and AST transaminase levels and platelet count. A FIB-4 index<1.45 in a context of fatty liver disease excludes clinically significant hepatic fibrosis. Additional explorations are mandatory to excluded hepatic fibrosis for a a FIB-4 index>1.45 in a context of fatty liver disease. A complete hepatological workup is mandatory for a FIB-4 index>3.25 in a context of fatty liver disease.
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