Table 4. COP distribution.

Subject	Center point average position		Average value of the center point drifting position and the center point of the average distance
	OE (before/after)	CE (before/after)	OE (before/after)		CE (before/after)
A	(−16.20, −1.97) / (2.55, −0.36)	(−13.80, 3.35) / (13.48, −22.41)	13.39 / 4.92		14.78 / 10.39
	COP distribution change: position moved to right side (affected side) from left side (healthy side).		Progress: OE: 63.25%, CE: 29.70% drift area of center point (before/after): OE: 1,284.90 / 543.50 (progress 57.70%) CE: 1,673.30 / 1,238.10 (progress 26%)
B	(27.10, 93.99)/ (22.89, 56.71)	(12.23, 76.06) / (23.42, 59.19)	6.92 / 5.12	14.03 / 14.82
	COP distribution change: moved from the upper side to the center (the virtual center of the center point on mapping plane)		Progress: OE: 26.01%, CE: −5.63% drift area of center point (before/after): OE: 767.20 / 574.30 (progress 25.14%) CE: 1599.90 / 873.20 (progress 45.42%)