Table 3.
Results of the Postural Sway and Simple Balance tests (medians only)—comparisons of Eyes Open versus Eyes Closed conditions and Affected side versus Non-affected side within the Chronic and the Acute group (P values are for the pair-wise comparisons between Eyes Open and Eyes Closed conditions and between Affected and Non-affected sides)
| Acute group | Chronic group | |||||
|---|---|---|---|---|---|---|
| A | N | P value | A | N | P value* | |
| Postural Sway | ||||||
| RMS-COP-EO | 0.011 | 0.012 | n.s. | 0.011 | 0.012 | n.s. |
| RMS-COP-EC | 0.020 | 0.021 | n.s. | 0.021 | 0.024 | n.s. |
| P value* | 0.002 | 0.001 | <0.001 | <0.001 | ||
| Speed-COP-EO (cm/s) | 0.040 | 0.035 | n.s. | 0.043 | 0.038 | n.s. |
| Speed-COP-EC (cm/s) | 0.091 | 0.093 | n.s. | 0.083 | 0.084 | n.s. |
| P value* | 0.001 | 0.001 | <0.001 | <0.001 | ||
| Simple Balance | ||||||
| Nr of failures-EO (/min) | 0 | 0 | n.s. | 1 | 0 | 0.02 |
| Nr of failures-EC (/min) | 13 | 11 | n.s. | 13 | 12 | n.s. |
| P value* | 0.001 | 0.001 | <0.001 | <0.001 | ||
| Time to first failure-EO (s) | 60 | 60 | n.s. | 55 | 60 | 0.03 |
| Time to first failure-EC (s) | 2 | 2 | n.s. | 3 | 4 | n.s. |
| P value* | 0.001 | 0.001 | <0.001 | <0.001 | ||
A Affected side, N Non-affected side, RM-COP root mean square of the distance of separate COP to the average COP, Speed-COP average speed of COP, EO Eyes Open, EC Eyes Closed
* Wilcoxon signed ranks test