Applicability and variability of liver stiffness measurements according to probe position

Table 4 Factors associated with discordance between reference and anterior positions n (%)

Characteristics	Concordant	Discordant	P
Number of patients	221	47
Mean age (SE)	47 (1)	49 (2)	0.16
Male	151 (68)	34 (72)	0.59
Ethnic origin
Caucasian	134 (61)	30 (64)	0.69
Asian	16 (7)	4 (8)	0.68
North African	27 (12)	6 (13)	0.87
Other African	44 (20)	7 (15)	0.38
Anthropometric data
Height (m)	1.71 (0.01)	1.71 (0.10)	0.96
Weight (kg)	69.8 (0.9)	73.6 (2.2)	0.12
BMI (kg/m2)	23.7 (0.2)	25.0 (0.5)	0.02
Abdominal fold (mm)	19.2 (0.6)	23.0 (1.6)	0.03
Thoracic fold (mm)	11.4 (0.4)	14.5 (0.9)	0.001
Waist circumference (cm)	82 (1)	86 (2)	0.047
Daily alcohol ≥ 30 g/d	18/137 (13)	2/23 (9)	0.55
Diagnosis
HCV	102 (46)	18 (38)	0.29
HBV	44 (20)	9 (19)	0.88
NAFLD	21 (10)	11 (23)	0.002
HIV coinfection	29 (13)	5 (11)	0.63
ALD	8 (4)	0 (0)	0.16
Other	46 (20)	9 (19)	0.88
Biochemistry
ALT (IU/L)	55 (3)	81 (19)	0.56
	n = 221	n = 47
AST (IU/L)	47 (2)	57 (6)	0.54
	n = 221	n = 47
Cholesterol (mmol/L)	4.63 (0.08)	4.85 (0.13)	0.06
	n = 186	n = 42
Glucose (mmol/L)	5.26 (0.09)	5.42 (0.17)	0.15
	n = 197	n = 46
Triglycerides (mmol/L)	1.15 (0.06)	1.37 (0.19)	0.10
	n = 186	n = 42
FibroTest	0.40 (0.01)	0.41 (0.06)	0.76
	n = 221	n = 47
ActiTest	0.32 (0.02)	0.34 (0.04)	0.59
	n = 221	n = 18
SteatoTest	0.30 (0.01)	0.38 (0.04)	0.04
	n = 183	n = 42