Real time shear wave elastography in chronic liver diseases: Accuracy for predicting liver fibrosis, in comparison with serum markers

Table 2 Liver stiffness cut-off values for the diagnosis of significant (≥ F2) and advanced (≥ F3) fibrosis and cirrhosis (F4) (n = 70)

Value	≥F2	≥F3	= F4
Number of patients, n (%)	55 (78.6)	35 (50.0)	22 (31.4)
Optimal cut-off1 (kPa)	8.60	10.46	14.00
Sensitivity (%)	78.20	88.60	77.30
Specificity (%)	93.30	80.00	85.40
Negative likelihood ratio	11.73	4.43	5.30
Positive likelihood ratio	0.23	0.14	0.27

¹Cut-off value was calculated to maximize the sum of sensitivity and specificity. kPa: Kilopascals.