Fibrosis-3 Index (FIB-3)

The Fibrosis-3 Index is an improved version of the FIB-4, that does not include age. It outperforms both FIB-4 and APRI.
Enter values
 
Value
Unit
AST
ALT
PLT

FIB-3 ranges

F3 or higher fibrosis was associated with FIB-3 above 1.89:
1.89
F3+ fibrosis from MASLD was associated with FIB-3 above 3.41:
3.41
Risk Scale
Optimal range for FIB-3 appears to be below 1.6:
-2
1.6
2
8
  • green - Fibrosis unlikely
  • yellow - F2 or higher fibrosis possible
  • red - F3 or higher fibrosis possible
This isn't medical advice. Consult your healthcare provider.

The Fibrosis-3 Index is an improved version of the FIB-4, that does not include age. It outperforms both FIB-4 and APRI.

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Zsolt Szabo
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