Liver fibrosis evaluation by ARFI and APRI in chronic hepatitis C

Table 2 Comparison of the diagnostic significance of acoustic radiation force impulse detection and AST/PLT Ratio Index in different stages of liver fibrosis

Diagnostic parameters	≥S2		≥S3		S4
	ARFI	APRI	ARFI	APRI	ARFI	APRI
Diagnostic threshold	1.530	0.171	1.790	0.278	1.789	0.443
Area under curve	0.775	0.721	0.901	0.787	0.792	0.780
95%CI	0.692-0.867	0.620-0.837	0.786-0.954	0.721-0.886	0.664-0.933	0.678-0.876
Sensitivity	0.576	0.876	0.764	0.703	0.789	0.789
Specificity	0.895	0.564	0.965	0.765	0.754	0.812

ARFI: Acoustic radiation force impulse; APRI: AST/PLT ratio index.