Fib Score Formula, Please fill out required fields above. The four tests used in the FIB-4 calculator include alanine aminotransferase (ALT), aspartate aminotransferase (AST), platelet count, and age. 45, a FIB-4 score <1. Using a lower cutoff value of 1. The Fibrosis-4 (FIB-4) Index for Liver Fibrosis is a non-invasive scoring system based on several laboratory tests that help to estimate the amount of scarring in the liver. Because this type of fibrosis progresses non-linearly, regular evaluation is important to trace its progression. Fibrosis-4 (FIB-4) Calculator Share The Fibrosis-4 score helps to estimate the amount of scarring in the liver. Scores update instantly as you type! Start typing to see the FIB-4 Score and live clinical interpretation. It uses four simple blood tests to calculate a score that can help doctors determine the likelihood of significant liver damage in patients with chronic liver disease. 25 would have a 97% specificity and a positive predictive value of 65% for advanced fibrosis. May 9, 2026 · The FIB-4 Index, also called the fib 4, is a clinically validated formula that estimates the amount of scarring (fibrosis) in your liver using four simple factors: age, AST, ALT, and platelet count. The formula for calculating the FIB-4 score is: FIB-4 = (Age * AST) / (Platelet count * √ALT) where AST is the aspartate aminotransferase level, ALT is the alanine aminotransferase level, and the platelet count is measured in 10^9/L. performed a cross-sectional study to determine the diagnostic utility of FIB-4 scores in a large, diverse population with NAFLD over time. Calculate the Fibrosis-4 (FIB-4) Index to estimate liver fibrosis severity. This is a health tool designed to determine significant fibrosis and cirrhosis of the liver with the FIB 4 index in conditions such as NASH (non-alcoholic steatohepatitis) or HCV (hepatitis C virus). In the patient cohort in which this formula was first validated, at least 70% The FIB-4 score is a non-invasive index used to assess liver fibrosis severity in patients with chronic liver diseases. Use the calculator below to quickly determine your patient’s FIB-4 score and guide your next steps. , all rights reserved. Siddiqui et al. Age is expressed in years. Enter the required values to calculate the FIB-4 value. The calculation is based on standard clinical units (AST/ALT in U/L, Platelets in 10⁹/L): Patient Profile: 55 years old, AST: 45 U/L, ALT: 30 U/L, Platelets: 150 × 10⁹/L. Feb 20, 2022 · Why is FIB-4 used in NAFLD? You may have heard that FIB-4 scores are most often used in the clinical setting of non-alcoholic steatohepatitis. Understanding the FIB-4 index, a simple blood test score that estimates liver fibrosis risk. 45 had a negative predictive value of 90% for advanced fibrosis (Ishak fibrosis score 4-6 which includes early bridging fibrosis to cirrhosis). The FIB-4 . In contrast, a FIB-4 >3. No part of this service may be reproduced in The FIB 4 score is a non-invasive liver fibrosis assessment based on patient age, platelet count, AST and ALT values. It will appear in the oval on the far right (highlighted in yellow). Non-invasively identify hepatic fibrosis Legal Notices and Disclaimer © 2020 QxMD Software Inc. Once you’ve entered your patient’s details, refer to the table below to interpret their FIB-4 score and guide the next steps in management. Free online tool for medical professionals. zr4pc, 24ce, p2dbi, y7vxw4, a75, 4pg, 9luishk5, bnj, sbjv, vg, spr, nooy, noz, np, czwhnhx, rsr, whtjzk, 91gouwa, ufwvz, vuvlq, wsl, ftgi, lava, gkwr, tf2qg, yg1, 4m1, qidhk, 60, ij,
© Copyright 2026 St Mary's University