Table 2.

Failure rate of transient elastography measurement

	Asian study				European study
	Kim et al[14]	Chan et al[24]	Masuzaki et al[25]	Wong et al[26]	Ziol et al[2]	Marcellin et al[10]	Maimone et al[27]
Etiology	HBV	HBV	HCV	HBV	HCV	HBV	HBV
Total patients (n)	74	1136	876	487	327	202	230
Excluded patients (n)	5	30	10	34	76	29	10
Excluded patients due to TE failure (n)	1	30	10	17	23	14	10
TE failure rate (%)	1.4	2.6	1.1	3.5	7	6.9	4.3
Enrolled patients (n)	69	1106	866	453	251	173	220
Age (yr)	38.9 (mean)	47 (mean)	66.2 (mean)	37 (median)	47.5 (mean)	40.1 (mean)	45.2 (mean)
Male, n (%)	35 (50.7)	-	398 (46.0)	270 (60.0)	155 (61.8)	115 (66.5)	99 (45.0)
BMI (kg/m2)	22.6 (mean)	-	22.5 (mean)	22.4 (median)	23.9 (mean)	24.5 (mean)	-
Failure criteria
Success rate	< 60%	< 60%	< 60%	< 60%	< 60%	< 50%	< 60%
The number of VMs	< 10 VMs	< 10 VMs	< 8 VMs	< 10 VMs	< 10 VMs	< 7 VMs	< 10 VMs

HBV: Hepatitis B virus; HCV: Hepatitis C virus; TE: Transient elastography; BMI: Body mass index; VM: Valid measurement.