Table 2.
Results of the Postural Sway and Simple Balance tests—differences between groups for the affected side (Results are given as median (range), P values are for the comparison of the three groups together)
| Healthy group | Acute group | Chronic group | P value* | |
|---|---|---|---|---|
| Median (min–max) | Median (min–max) | Median (min–max) | ||
| Postural Sway test | ||||
| RMS-COP-EOA (m) | 0.012 (0.007–0.026) | 0.011 (0.008–0.016) | 0.011 (0.008–0.027) | n.s. |
| RMS-COP-ECA (m) | 0.018 (0.009–0.035) | 0.020 (0.015–0.026) | 0.021 (0.008–0.043) | n.s. |
| Speed-COP-EOA (m/s) | 0.038 (0.025–0.089) | 0.040 (0.030–0.063) | 0.043 (0.025–0.064) | n.s. |
| Speed-COP-ECA (m/s) | 0.076 (0.044–0.112) | 0.091 (0.056–0.132) | 0.083 (0.041–0.208) | n.s. |
| Simple Balance test | ||||
| Number of Failures-EOA (/min) | 0 (0–16) | 0 (0–9) | 1 (0–10) | n.s. |
| Number of Failures-ECA (/min) | 11 (4–18) | 13 (4–17) | 13 (5–19) | n.s. |
| Time to first failure-EOA (s) | 60 (3–60) | 60 (4–60) | 55 (1–60) | n.s. |
| Time to first failure-ECA (s) | 3 (1–13) | 2 (1–7) | 3 (1–17) | n.s. |
RMS-COP root mean square of the distance of separate COP to the average COP, Speed-COP average speed of COP, EOA Eyes Open Affected side, ECA Eyes Closed Affected side
* Kruskal–Wallis test