The cut-off values of the shear wave velocity (SWV) were as follows: ≥1.29 m / s for ≥F2 (sensitivity 64.3%, specificity 83.8%, PPV 60% and NPV 86.1%), ≥ 1.38 m / s for F3 (sensitivity 75%, specificity 89.4%, PPV 57.5%, NPV 97.7%).