Table 2.

Multiple linear regression analyses of the effects of muscle mass, muscle strength and physical function on depression

	SMI		Handgrip strength		Chair stand test		Gait speed	Standing balance test			SPPB
	β	P value	β	P value	β	P value	β	P value	β	P value	β	P value
Age	−0.006	0.366	−0.22	0.001***	0.08	0.132	−0.009	0.002**	−0.019	0.002**	−0.031	0.011*
Gender	−1.485	<0.001***	−14.963	<0.001***	0.285	0.685	−0.05	0.184	−0.075	0.36	0.059	0.713
BMI	0.157	<0.001***	0.233	0.118	0.176	0.147	−0.008	0.217	−0.012	0.388	−0.044	0.111
Depression score	0.004	0.684	−0.174	0.092	0.325	<0.001***	−0.009	0.041*	−0.24	0.016*	−0.061	0.002**

Adjustment for age, gender and BMI; β standardised coefficient.

*p<0.05; **p<0.01; ***p<0.001 indicate a statistically significant difference.

BMI, body mass index; SMI, appendicular skeletal muscle mass index; SPPB, Short Physical Performance Battery.