Is it better to use two elastographic methods for liver fibrosis assessment?

Table 1 Predictive value of transient elastography and acoustic radiation force impulse alone, for F ≥ 2 and F = 4 (%)

	F≥2								F = 4
	Cut-off	AUROC	Se	S	PPV	NPV	Accuracy		Cut-off	AUROC	Se	Sp	PPV	NPV	Accuracy
TE	6.7 kPa	0.87	77.5	86.7	94.8	54.9	79.6		12.2 kPa	0.97	96.2	89.6	78.1	98.3	91.4
ARFI	1.2 m/s	0.84	76.9	86.7	95.7	54.1	79.3		1.8m/s	0.91	90.4	85.6	50.3	95.8	83.4

TE: Transient elastography; ARFI: Acoustic radiation force impulse; AUROC: Area under the receiver operating characteristic curve; Se: Sensitivity; Sp: Specificity; PPV: Positive predictive value; NPV: Negative predictive value.