Non-alcoholic fatty liver disease algorithm.
For those patients with NAFLD or liver disease of unknown aetiology, the next step is to determine the likelihood of liver fibrosis. Initial assessment includes calculation of a FIB4 or NAFLD fibrosis score with values <1.3 and ≤1.455, respectively, signifying a low risk of advanced fibrosis. Higher cut-off points, <2.0 and <0.12, should be used for patients aged over 65 years. Second-line tests that should be considered include serum markers such as ELF and imaging modalities such as ARFI elastography/FibroScan. For children, the text should be consulted for modification of recommendation. Cut-off points for ARFI vary according to manufacturer and thus should be tailored to the device used. ARFI, acoustic radiation force impulse; ELF, enhanced liver fibrosis; FIB-4, fibrosis-4; HCC, hepatocellular carcinoma; NAFLD, non-alcoholic fatty liver disease; NFS, NAFLD Fibrosis Score.
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