The second decision tree included only three possible genotypic combinations: the rs430397 G/G was fixed and combined with the three rs738409 genotypes; the discriminating attributes were age, sex, HBV status, steatosis, ascites, variceal haemorrhage, thrombocytopenia, prolonged prothrombin time, elevated serum alpha-fetoprotein (Figure 2). Here, F2 is linked to steatosis.