The Korean Journal of Sports Medicine

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Table. 2.

Table. 2.

Results of center of pressure (COP) value during static postural control

Variable LAS copers Patients with CAI Controls F/H p-value Effect size Post-hoc analysis
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** 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.

Korean J Sports Med 2022;40:110-9 https://doi.org/10.5763/kjsm.2022.40.2.110
© 2022 Korean J Sports Med