Table 1.

Characteristics of knee OA and control groups.

	Knee OA group (n=89)	Control group (n=42)	p-value
	Mean (SD)	Mean (SD)
Age, yr	65.8 (5.5)	64.5 (2.9)	0.224
Height, cm	151.7 (5.4)	153.7 (5.2)	0.304
Weight, kg	61 (8.6)	58.2 (7.2)	0.004
Body mass index, kg/m2	26.5 (3.5)	24.6 (2.9)	0.002
HKA axis (right side)	5.9 (3.8)	1.7 (1.8)	<0.001
Gait speed (cm/s)	88.7 (17.5)	111.2 (8.4)	<0.001
Stride length (cm)	97.9 (13.7)	115.7 (7)	<0.001
Step width (cm)	10.3 (3.2)	8.5 (1.8)	<0.001

SD: standard deviation, HKA axis: hip-knee-ankle mechanical axis