Table 2.

Inter-item correlation values for each signal among subjects

Sensor	Acceleration			Angular velocity			CoP displacement
Axis	ML	AP	UD	ML	AP	UD	ML	AP
r (p < 0.05)	0.55	0.44	0.55	0.13	0.2	0.56	0.6	0.63

Inter-item correlation values for each signal among subjects. These values indicate the similarity in patterns among several subjects.