Table 3.

Multivariate regression analysis: Independent factors of BMD in the lumbar spine and femoral neck.

BMD	Variables	Coefficient	Standardized coefficient	p-value
Lumbar spine	SMI	0.101	0.578	<0.001
Femoral neck	SMI	0.046	0.468	<0.001
	ucOC	−0.003	−0.366	0.001
	Sex (male:1)	0.055	0.231	0.046

BMD, bone mineral density; SMI, skeletal muscle mass index; ucOC, undercarboxylated osteocalcin.