Presentation of changes in motor (changes in MSV3D expressed as Romberg ratio ST, motor DT ratio, Romberg ratio DT, and motor DT ratio EC) and cognitive (change in the number of arithmetic steps expressed as cognitive DT ratio) performance between the different conditions relative to their defined baseline condition (see Figure 1), expressed as a ratio (median, min–max)
| Ratios | HC | pwMS | Test value* (P) |
|---|---|---|---|
| Changes in motor performance | |||
| Romberg ratio ST | 1.38 (0.71–2.26) | 1.55 (0.63–5.91) | 1,749 (0.012) |
| Motor DT ratio EO | 1.19 (0.61–5.17) | 1.43 (0.64–17.08) | 2,813 (0.444) |
| Romberg ratio DT | 1.08 (0.32–2.50) | 1.09 (0.13–2.95) | 2,313 (0.809) |
| Motor DT ratio EC | 1.03 (0.31–4.04) | 0.97 (0.39–6.07) | 2,107 (0.284) |
| Changes in cognitive performance | |||
| Cognitive DT ratio | 1.17 (0.63–2.25) | 1.10 (0.50–2.75) | 1,932 (0.075) |
* Statistical tests for group comparison: Mann-Whitney U test (Mann-Whitney U value). DT: dual task; EC: eyes closed; EO: eyes open; HC: healthy controls; MSV3D: Mean angular Sway Velocity in 3D; pwMS: persons with multiple sclerosis; ST: single-task
