Identification of Hepatic Fibrosis Carriers Fibrosis-4 Score Calculator

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Identification of Hepatic Fibrosis Carriers Fibrosis-4 Score

The FIB-4 (Fibrosis-4 score) is a biomarker of the risk of severe fibrosis (ie F3 or F4 fibrosis). The FIB-4 is based on a simple algorithm that is calculated using the patient's age, platelet count, and transaminases.

How to calculate the FIB 4?

The Fibrosis-4, or FIB4 score can correctly identify patients with severe fibrosis (F3-F4). A FIB4 ≤ 1.45 has a negative predictive value of 93.7% and a FIB4 > 4 has a positive predictive value of 66%. References: Formula: Fib4 = (Age x AST) / (Platelets x √[ALT]).