Discrepancy between fibrosis class classifications by non-invasive tests and liver biopsy staging. Results (Y axis) are expressed as a function of Metavir fibrosis (F) stage (X axis) in population #3. The left panel A indicates the mean score. The right panels show the details of discrepancy grades for each diagnostic test: Fibrotest (B), Fibroscan (C), FibroMeter2G (D) and FibroMeter3G (E). The grade indicates the difference in the number of fibrosis stage(s) between the blood test and liver biopsy. FT: Fibrotest, FS: Fibroscan, FM2: FibroMeter2G, FM3: FibroMeter3G.