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. Author manuscript; available in PMC: 2012 Mar 1.
Published in final edited form as: Gait Posture. 2011 Jan 26;33(3):429–435. doi: 10.1016/j.gaitpost.2010.12.019

Table 2.

Mean values ± S.D of COP Displacement Velocity postural stability parameters with eyes opened (O) and closed (C). No difference was observed at baseline in any COP Velocity parameter, though significant differences were measured, relative to baseline, between both control and LMMS groups at day 60 and 90. For the AP directions in the eyes-closed condition, the percent difference from baseline for both control and LMMS, as well as the “benefit” of LMMS (inferred from relative LMMS retention of baseline measures as compared to control) at that time point, are also provided.

Eyes Baseline Day 60 Day 90 p value
Control LMMS Control LMMS Control LMMS Day 60 Day 90
Peak Velocity (AP) (mm/s) O
C
38.0 ±18.2
51.5 ± 19.0
41.7 ± 17.4
68.3 ± 45.7
100.2 ± 69.9
150.7 ±102.1
57.4 ± 18.7
72.7 ± 12.0
62.7 ± 13.0
115.9 ± 11.1
34.7 ± 22.2
82.2 ± 26.5
0.04
0.004
0.49
0.09
Change From Baseline C +192.6%
P = 0.008
+6.4%
P = 0.43
+125.0%
P = 0.002
+20.4%
P = 0.14
Benefit of LMMS C +97%
P = 0.02
+83%
P = 0.01
RMS Velocity (AP) O
C
6.9 ± 2.5
10.0 ± 3.4
8.1 ± 3.5
11.2 ± 5.8
14.8 ± 9.2
26.6 ± 20.7
10.0 ± 2.2
14.3 ± 2.7
10.8 ± 2.5
19.5 ± 11.1
12.1 ± 4.0
16.1 ± 5.3
0.11
0.02
0.21
0.23
Change From Baseline C +166.6%
P = 0.008
+27.7%
P = 0.041
+95.0%
P = 0.002
+43.8%
P = 0.006
Benefit of LMMS C +83%
P = 0.05
+54%
P = 0.06
Mean Velocity (mm/s) O
C
6.3 ± 2.1
8.7 ± 2.8
7,1 ± 3.1
9.6 ± 4.8
13.5 ± 8.8
23.9 ± 20.1
9.1 ± 2.0
12.2 ± 2.3
10.0 ± 2.3
16.8 ± 8.5
11.0 ± 4.3
14.3 ± 5.4
0.10
0.02
0.38
0.18

AP = antero-posterior, ML = medio-lateral