highly significantp < 0.01
It has been reported a highly significant positive correlation between serum level of CA19-9 and the stage of liver fibrosis (p < 0.01). 6 As regards CA19-9 in differentiating the presence (F1) from absence (F0) of liver fibrosis, they found that the best cut-off value was 2.98 U/ml with a sensitivity of 86.7%, specificity of 60%.