The accuracy of the FIB-4 index for the diagnosis of mild fibrosis in chronic hepatitis B.

BACKGROUND: The Fib-4 index is a simple and inexpensive biomarker to delineate liver fibrosis in chronic hepatitis C. AIM: To assess the accuracy of the FIB-4 index in chronic hepatitis B. METHODS: We compared the FIB-4 index with 138 synchronous liver biopsies and with 372 synchronous FibroTest performed either in France or in an endemic area (Mayotte, an overseas collectivity of France). RESULTS: The FIB-4 index allowed the correct identification of patients with nil-to-moderate fibrosis with an area under the receiving operating characteristic curve of 0.81 (P < 0.001), increasing as a function of the length of the liver biopsy (up to 0.94 for liver biopsies >or=20 mm). A cut-off value