Table 3.
Means (standard deviations) of center of pressure (COP) variables during eyes-open (EO) and eyes-closed (EC) conditions
| Variables | Conditions | U8 | U11 | U14 | Age group Effect | Condition effect | Age group by condition |
|---|---|---|---|---|---|---|---|
| ML Disp (cm) | EO | 5.1 (3.8) |
5.4 (3.7) |
3.9 (2.2) |
P = 0.04* | P = 0.05* | P = 0.09 |
| EC | 11.6 (8.9) |
6.6 (5.0) |
3.4 (1.6) |
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| AP Disp (cm) | EO | 6.0 (4.0) |
5.4 (2.9) |
5.4 (1.9) |
P = 0.71 | P = 0.76 | P = 0.94 |
| EC | 6.4 (2.0) |
5.6 (1.9) |
5.3 (2.6) |
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| Total distance (cm) | EO | 45.6 (15.4) |
38.1 (24.7) |
29.1 (7.8) |
P = 0.02* | P = 0.01* | P = 0.09 |
| EC | 95.8 (74.6) |
48.4 (25.4) |
33.4 (14.1) |
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| Sway area (cm2) | EO | 16.9 (15.6) |
10.5 (10.4) |
7.9 (5.9) |
P = 0.36 | P = 0.00* | P = 0.28 |
| EC | 39.9 (40.4) |
41.3 (41.4) |
13.7 (13.2) |
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| ML SampEn | EO | 0.09 (0.05) |
0.08 (0.03) |
0.08 (0.04) |
P = 0.26 | P = 0.45 | P = 0.42 |
| EC | 0.10 (0.04) |
0.07 (0.03) |
0.06 (0.03) |
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| AP SampEn | EO | 0.08 (0.03) |
0.07 (0.01) |
0.09 (0.04) |
P = 0.13 | P = 0.87 | P = 0.14 |
| EC | 0.10 (0.03) |
0.07 (0.03) |
0.06 (0.03) |
Note: ML = mediolateral; AP = anteroposterior; Disp = displacement; SampEn = sample entropy