Table 2 Mean (95 % CI) measures of sway with significant group differences: eyes open
*Instrumented measure of sway | Group with MS | Control group | Mann–Whitney U (p-value) |
|---|---|---|---|
ML jerk (m2/s5) | 0.0092 (0.0064–0.0120) | 0.0030 (0.0023–0.0037) | 25 (p < 0.0001) |
Horizontal sway area (m2/s4) | 0.0086 (0.0064–0.0108) | 0.0038 (0.0032–0.0045) | 37 (p < 0.0001) |
95 % confidence circle area (m2/s4) | 0.099 (0.076–0.121) | 0.049 (0.037–0.061) | 63 (p = 0.0001) |
95 % confidence ellipse area (m2/s4) | 0.083 (0.060–0.105) | 0.034 (0.028–0.041) | 49 (p < 0.0001) |
AP root mean square (m/s2) | 0.084 (0.075–0.093) | 0.062 (0.054–0.070) | 73 (p = 0.00036) |
Horizontal root mean square (m/s2) | 0.101 (0.089–0.113) | 0.071 (0.063–0.078) | 62 (p < 0.0001) |
ML root mean square (m/s2) | 0.052 (0.042–0.062) | 0.031 (0.027–0.036) | 70 (p = 0.00026) |
AP mean sway velocity (m/s) | 0.221 (0.189–0.254) | 0.149 (0.116–0.183) | 72 (p = 0.00032) |
Horizontal mean sway velocity (m/s) | 0.278 (0.233–0.324) | 0.187 (0.157–0.216) | 69 (p = 0.00022) |
AP sway radius (m/s2) | 0.068 (0.061–0.075) | 0.050 (0.043–0.057) | 74 (p = 0.00042) |
Horizontal sway radius (m/s2) | 0.088 (0.077–0.098) | 0.061 (0.055–0.067) | 62 (p < 0.0001) |
ML sway path length (m/s2) | 5.23 (4.54–5.93) | 3.22 (2.82–3.61) | 38 (p < 0.0001) |
Horizontal range of acceleration (m/s2) | 0.541 (0.478–0.604) | 0.382 (0.340–0.423) | 63 (p = 0.0001) |
ML range of acceleration (m/s2) | 0.293 (0.247–0.340) | 0.164 (0.147–0.182) | 37 (p < 0.0001) |
ML total spectral power (m2/s4) | 0.812 (0.561–1.063) | 0.230 (0.199–0.262) | 27 (p < 0.0001) |