Table 3.

Independency of muscle measurements and SPPB score.

	SPPB score
Measurement	model 1		model 2		model 3		model 4		model 5
	β	P	β	P	β	P	β	P	β	P
Thigh muscle CSA (mm2)	0.165	0.161	0.150	0.236	0.015	0.888	-0.064	0.593	-0.128	0.279
L3 trunk muscle CSA (mm2)	0.194	0.097	0.185	0.146	0.036	0.744	-0.045	0.712	-0.170	0.171
G.Med/MinM CSA (mm2)	0.365	0.001	0.388	0.002	0.242	0.024	0.213	0.076	0.087	0.488
G.MaxM CSA (mm2)	0.250	0.032	0.258	0.048	0.116	0.286	0.047	0.706	-0.064	0.595
Thigh muscle PDFF (%)	-0.254	0.029	-0.251	0.032	-0.154	0.145	-0.144	0.172	-0.074	0.460
L3 trunk muscle PDFF (%)	-0.284	0.014	-0.286	0.014	-0.078	0.502	-0.072	0.536	-0.068	0.535
G.Med/MinM PDFF (%)	-0.321	0.005	-0.331	0.004	-0.126	0.280	-0.131	0.257	-0.121	0.258
G.MaxM PDFF (%)	-0.318	0.006	-0.331	0.004	-0.172	0.117	-0.183	0.093	-0.161	0.116

β is the regression coefficient; The values of P < 0.05 were marked in bold.

L3 trunk, third lumbar trunk; G.Med/MinM,gluteus minimus and medius muscle; G.MaxM, gluteus maximus muscle; CSA, muscle cross-sectional area; PDFF, proton-density fat-fraction.

model 1, Unadjusted. model 2, Adjusted for BMI. model 3, Adjusted for age. model 4, Adjusted for age and BMI. model 5, Adjusted for age, BMI, albumin, predialysis BUN, predialysis creatinine, and phosphorus.