Table 1. Reference values.

Fibrosis stage	ARFI quantification	2D-SWE
	m/s	m/s	kPa
F0-1	≤1.34	≤2.65	≤7.00
F2	≥1.35	≥2.66	≥7.10
F3	≥1.61	≥3.03	≥9.20
F4	≥1.87	≥3.67	≥13.5
	Nierhoff et al. 2013	Herrmann et al. 2015

USE reference values for ARFI quantification and 2D-SWE with histological scoring system for fibrosis staging according to METAVIR: F0-1 = no or minimal fibrosis, F2 = significant fibrosis, F3 = severe fibrosis, F4 = cirrhosis [11,20,21]. 2D-SWE reference values were transformed from stiffness (kPa) to SWS (m/s).