## Appendix A
\begin{table}
\begin{tabular}{l c c c c c c c} \hline \hline  & \multicolumn{3}{c}{**Least Squares Mean (SE) for Group x Time Interaction**} & \multicolumn{3}{c}{**Effect**} \\
**Variable** & \multicolumn{3}{c}{**OEP Plus Usual Care**} & \multicolumn{3}{c}{**Usual Care**} & \multicolumn{3}{c}{**Size**} & \multicolumn{1}{c}{**F**} & \multicolumn{1}{c}{\(p\)**-Value**} \\
**Variable** & **Baseline** & **6 Months** & **Baseline** & **6 Months** & \(\eta_{p}\)**2 ** & & & \\ \hline
**Single-Task Postural Sways** & & & & & & & \\ Sway Area (\(\mathrm{m^{2}/s^{4}}\)) & 0.43 (0.21) & 0.14 (0.24) & 0.15 (0.10) & 0.19 (0.10) & 0.0019 & 1.24 & 0.28 \\ Centroidal Frequency (Hz) \(\wedge\) & 0.97 (0.10) & 1.04 (0.10) & 0.96 (0.07) & 1.06 (0.07) & 0.0012 & 0.06 & 0.81 \\ Jerk (\(\mathrm{m^{2}/s^{5}}\)) \(\vee\) & 28.86 (12.42) & 14.35 (13.58) & 7.01 (5.72) & 15.12 (5.87) & 0.0035 & 2.61 & 0.12 \\ Suzy Velocity (m/s) \(\vee\) & 0.47 (0.11) & 0.30 (0.12) & 0.26 (0.05) & 0.24 (0.05) & 0.0035 & 0.74 & 0.40 \\
**Dual-Task Postural Sways** & & & & & & \\ Sway Area (\(\mathrm{m^{2}/s^{4}}\)) \(\vee\) & 0.29 (0.14) & 0.19 (0.16) & 0.20 (0.09) & 0.12 (0.09) & 0.0035 & 0.02 & 0.90 \\ Centroidal Frequency (Hz) \(\wedge\) & 0.96 (0.10) & 1.03 (0.11) & 1.13 (0.08) & 1.15 (0.08) & 0.0028 & 0.26 & 0.62 \\ Jerk (\(\mathrm{m^{2}/s^{5}}\)) \(\vee\) & 27.14 (0.125) & 7.99 (13.43) & 8.53 (3.22) & 9.48 (3.23) & 0.0052 & 1.39 & 0.26 \\ Sway Velocity (m/s) \(\vee\) & 0.42 (0.09) & 0.46 (0.10) & 0.25 (0.07) & 0.28 (0.07) & 0.0000 & 0.00 & 0.96 \\
**360 Trum** & **Time Angle** (\(\mathrm{c^{\prime}}\)) \(\wedge\) & 234.95 (33.91) & 212.50 (39.72) & 291.68 (27.25) & 283.15 (28.85) & 0.0013 & 0.09 & 0.77 \\ Duration (s) \(\vee\) & 4.67 (0.48) & 4.24 (0.61) & 5.46 (0.49) & 5.22 (0.53) & 0.0014 & 0.04 & 0.84 \\ Turn Velocity (s) \(\wedge\) & 98.03 (13.58) & 93.28 (15.58) & 100.01 (10.43) & 102.80 (10.97) & 0.0042 & 0.20 & 0.66 \\
**4 m Walk Single-Task** & & & & & & & \\ Double-Limb Support (\%) \(\vee\) & 35.51 (2.41) & 19.94 (2.65) & 34.04 (2.05) & 15.07 (2.13) & 0.0042 & 0.97 & 0.33 \\ Mid-Swing Elevation (cm) \(\wedge\) & 0.88 (0.24) & 1.42 (0.26) & 0.93 (0.22) & 1.36 (0.23) & 0.0014 & 0.10 & 0.75 \\ Gait Speed (m/s) \(\wedge\) & 0.41 (0.06) & 0.63 (0.07) & 0.44 (0.08) & 0.68 (0.08) & 0.0014 & 0.02 & 0.88 \\ Stride Length (m) \(\wedge\) & 0.59 (0.06) & 0.75 (0.07) & 0.66 (0.07) & 0.78 (0.07) & 0.0009 & 0.11 & 0.75 \\ Medial-Lateral Trunk Range of Motion (\(\mathrm{c^{\prime}}\)) \(\wedge\) & 3.43 (0.51) & 3.94 (0.54) & 3.86 (0.61) & 3.45 (0.62) & 0.0404 & 2.60 & 0.12 \\
**4 m Walk Dual-Task** & & & & & & & \\ Double-Limb Support (\%) \(\vee\) & 38.69 (2.34) & 32.37 (2.32) & 39.78 (1.86) & 33.88 (1.92) & 0.0404 & 0.01 & 0.91 \\ Mid-Swing Elevation (cm) \(\wedge\) & 0.86 (0.28) & 1.17 (0.29) & 0.53 (0.42) & 1.56 (0.44) & 0.0404 & 1.12 & 0.30 \\ Gait Speed (m/s) \(\wedge\) & 0.34 (0.07) & 0.37 (0.08) & 0.33 (0.18) & 0.77 (0.20) & 0.0404 & 1.24 & 0.28 \\ Stride Length (m) \(\wedge\) & 0.49 (0.08) & 0.67 (0.08) & 0.53 (0.12) & 0.78 (0.13) & 0.0404 & 0.14 & 0.72 \\ Medial-Lateral Trunk Range of Motion (\(\mathrm{c^{\prime}}\)) \(\wedge\) & 3.07 (0.44) & 3.72 (0.46) & 4.11 (0.52) & 4.23 (0.53) & 0.0151 & 0.79 & 0.38 \\ \hline \hline \end{tabular}
\end{table} 
Table 16: **Time Angle** (\(\mathrm{c^{\prime}}\)) \