FIB-4 | English

FIB-4 (fibrosis-4 score) is a simple index for estimating hepatic fibrosis based on a calculation derived from AST, ALT and platelet concentrations, and age. Transient elastography (e.g. FibroScan) or FibroTest may be the preferred NITs in settings where they are available and cost is not a major constraint.

FIB-4 Score Caculator

Age (years):

AST Level (U/L):

Platelet Count (10⁹/L):

ALT Level (U/L):

FIB-4 Score= (Age x AST ) / (Platelet count x √ALT)

Your FIB-4 Score :

Back to select

Interpretation: FIB-4 score > 3.6 has a 90.8% positive predictive value with 98% specificity and 30% sensitivity in detecting cirrhosis, whereas FIB-4 score < 1.6 has a negative predictive value of 93% in detecting cirrhosis. FIB 4 > 2.6 has a 94.6% positive predictive value and 97.8% specificity in detecting severe liver fibrosis (> F3).
(Kim BK et al. Liver International 2009)

FIB-4 Score= (Age x AST ) / (Platelet count x √ALT)

Your FIB-4 Score :

Back to select

Interpretation:

Fib-4 score >3.6 in adults