FIB-4 Score

Estimate liver fibrosis using age, AST, ALT, and platelet count.

Clinical & Lab Inputs

Age

years

Ast

Alt

Platelets

10⁹/L

Result Title

FIB-4 Index1.52

Risk LevelIndeterminate

Gray zone. Advanced fibrosis cannot be reliably excluded or confirmed.

Interpretation

Threshold Markers

< 1.45Advanced Fibrosis Excluded

1.45 - 3.25Indeterminate Zone

> 3.25Advanced Fibrosis Likely

Overview

The FIB-4 index is a non-invasive marker of liver fibrosis.

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Pro Tips

Score below 1.45 rules out advanced fibrosis.
Score above 3.25 suggests advanced fibrosis.

Fun Facts

"FIB-4 stands for Fibrosis-4."
"It was originally developed for HIV/HCV coinfected patients."

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