Comparison between magnetic resonance imaging and electrical impedance myography for evaluating lumbar skeletal muscle composition

Table 4 Correlations of BF% and muscle quality obtained from EIM with Goutallier score, SMI, SARC-F scores, and BMI in three different groups of patients according to their age (18–40 years, 41–70 years, over 70 years) using the Pearson correlation coefficient

		BF%	Goutallier	SARC-F	M. quality	SMI	BMI
18–40 yo
BF%	r	1	.485**	-.422**	-.785**	0.092	−0.006
BF%	p		0.002	0.007	0	0.599	0.972
Goutallier	r	.485**	1	−0.086	-.401*	− 0.271	0.257
Goutallier	p	0.002		0.603	0.011	0.116	0.136
SARC-F	r	-.422**	−0.086	1	.317*	−0.067	0.122
SARC-F	p	0.007	0.603		0.049	0.701	0.485
M. quality	r	-.785**	-.401*	.317*	1	0.042	0.137
M. quality	p	0	0.011	0.049		0.812	0.434
SMI	r	0.092	−0.271	−0.067	0.042	1	.607**
SMI	p	0.599	0.116	0.701	0.812		0
BMI	r	−0.006	0.257	0.122	0.137	.607**	1
BMI	p	0.972	0.136	0.485	0.434	0
41–70 yo
BF%	r	1	.448**	0.16	-.771**	−0.014	.618**
BF%	p		0	0.235	0	0.937	0
Goutallier	r	.448**	1	.412**	-.365**	-.371*	0.063
Goutallier	p	0		0.001	0.005	0.026	0.717
SARC-F	r	0.16	.412**	1	0.036	-.429**	0.034
SARC-F	p	0.235	0.001		0.791	0.009	0.842
M. quality	r	-.771**	-.365**	0.036	1	−0.249	-.704**
M. quality	p	0	0.005	0.791		0.142	0
SMI	r	−0.014	-.371*	-.429**	−0.249	1	.510**
SMI	p	0.937	0.026	0.009	0.142		0.001
BMI	r	.618**	0.063	0.034	-.704**	.510**	1
BMI	p	0	0.717	0.842	0	0.001
Over 70 yo
BF%	r	1	−0.118	−0.118	-.816**	-.446**	0.006
BF%	p		0.439	0.439	0	0.006	0.971
Goutallier	r	−0.118	1	1000**	0.221	-.643**	−0.114
Goutallier	p	0.439		0	0.144	0	0.507
SARC-F	r	−0.118	1000**	1	0.221	-.643**	−0.114
SARC-F	p	0.439	0		0.144	0	0.507
M. quality	r	-.816**	0.221	0.221	1	0.236	−0.204
M. quality	p	0	0.144	0.144		0.166	0.232
SMI	r	-.446**	-.643**	-.643**	0.236	1	.414*
SMI	p	0.006	0	0	0.166		0.012
BMI	r	0.006	−0.114	−0.114	−0.204	.414*	1
BMI	p	0.971	0.507	0.507	0.232	0.012

M. quality Muscle quality obtained from EIM, BF% Body fat percentage obtained from EIM, SMI Skeletal muscle index, yo years old, r Pearson correlation coefficient, p significance; * = significant values with p < 0.05; ** = significant values with p < 0.01

ISSN: 1471-2474