Table 1. Comparison of body composition variables between normal, osteopenia and osteoporosis. Values are means (±SD).

	Variables	Normal (n = 85)	Osteopenia (n = 120)	Osteoporosis (n = 64)	P for linear trends
Demographic Measures	Age (yrs)	71.7 (5.3)	72.4 (4.5)	80.3 (6.0)	.001
	Menopause period (yrs)	50.7 (3.9)	49.0 (4.8)	49.0 (3.0)	.180
Body Composition	BMI (kg·m2)	25.3 (3.1)	25.1 (3.4)	22.7 (3.3)	.039
	Body fat (%)	36.7 (6.2)	36.3 (6.1)	33.6 (7.7)	.264
	Lean mass (kg)	35.3 (3.0)	34.9 (3.4)	32.6 (3.3)	.032
	WC (cm)	83.6 (9.3)	84.3 (8.3)	83.8 (8.8)	.934
	ASM index (kg·m2)	6.1 (.4)	5.9 (.6)	5.5 (.5)	.007
Bone Mineral Density	Femur total BMD (g·cm2)	.937 (.076)	.783 (.048)	.655 (.107)	.001
	Femur total T-score	-.22 (.67)	-1.61 (.42)	-2.89 (.73)	.001
	Femur neck BMD (g·cm2)	.814 (.073)	.704 (.058)	.588 (.132)	.001
	Femur neck T-score	-1.06 (.61)	-1.99 (.50)	-2.94 (1.09)	.001
Physical Activity	LPA (min/day)	54.9 (14.2)	49.6 (14.6)	31.7 (14.7)	.001
	MPA (min/day)	21.2 (15.7)	17.7 (9.2)	7.6 (6.2)	.002
	VPA (min/day)	1.3 (1.6)	1.2 (1.4)	.6 (.6)	.234

BMD: bone mineral density; BMI: body mass index; WC: waist circumference; ASM: appendicular skeletal muscle mass; LPA: low physical activity; MPA: moderate physical activity; VPA: vigorous physical activity.