Results of center of pressure (COP) value during static postural control
| Variable | LAS copers | Patients with CAI | Controls | F/H | p-value | Effect size |
|
|---|---|---|---|---|---|---|---|
| COP path length (cm) | 16.34±4.1 | 18.75±3.07 | 16.73±4.25 | 2.268 |
0.113 | 0.07 | - |
| Area 95% confidence ellipse (cm2) | 0.85±0.37 | 1.06±0.41 | 0.89±0.26 | 3.123 |
0.210 | 0.02 | - |
| Mediolateral COP | |||||||
| Standard deviation (cm) | 0.20±0.05 | 0.22±0.04 | 0.21±0.03 | 1.930 |
0.154 | 0.06 | - |
| Range (cm) | 0.91±0.13 | 1.06±0.13 | 1.06±0.11 | 18.322 |
<0.001 |
0.29 | Copers |
| Mean velocity (cm/sec) | 1.11±0.3 | 1.24±0.13 | 1.14±0.35 | 3.429 |
0.180 | 0.03 | - |
| Anteroposterior COP | |||||||
| Standard deviation (cm) | 0.21±0.06 | 0.26±0.07 | 0.25±0.06 | 3.756 |
0.029 |
0.17 | Copers |
| Range (cm) | 0.99±0.22 | 1.30±0.38 | 1.18±0.31 | 8.365 |
0.015 |
0.11 | Copers |
| Mean velocity (cm/sec) | 0.83±0.18 | 0.99±0.21 | 0.90±0.14 | 4.411 |
0.017 |
0.13 | Copers |
Values are presented as mean±standard deviation.
LAS: lateral ankle sprain, CAI: chronic ankle instability.
†Effect size was calculated as eta square for Kruskal-Wallis H (η2H) and as partial eta square (η2p) for one-way analysis of variance (ANOVA). ‡Statistical values were presented as H through Kruskal-Wallis H. §Statistical values were presented as F through one-way ANOVA.
*p<0.05, **p<0.01, ***p<0.001.
