## 3 Results
### Longitudinal Analysis  
Longitudinal analysis within the HTO patients can be viewed in Tables 2 and 3, and in Figures 2-4. For posturographic parameters, we only found a significant main effect for time (preoperative vs. six months post-operation) in weight distribution index (WDI) (Table 2; Figure 3B). \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Parameter**} & \multicolumn{5}{c}{**Examinations (Exam)**} & \multicolumn{5}{c}{**Variance Analysis**} \\ \cline{2-7}  & \multicolumn{2}{c}{**Exam 1**} & \multicolumn{2}{c}{**Exam 2**} & \multicolumn{2}{c}{**Exam 3**} & \multicolumn{2}{c}{**Exam 4**} & \multicolumn{2}{c}{**Exam 1 vs. Exam 4**} & \multicolumn{2}{c}{**Adigement Exams**} \\ \hline
**Matched Sample** & **Preoperative** & **6 Weeks Postoperative** & **12 Weeks Postoperative** & **6 Months Postoperative** & **p** & \(\mathbf{n_{p}}^{2}\) & \(\mathbf{n_{p}}^{2}\) \\ \hline Visual and Nigrostriatal & \(18.4\pm 5.44\) & \(20.9\pm 22.1\) & \(21.6\pm 22.0\) & \(\mathbf{17.7\pm 5.07}\) & 0.635 & 0.014 & - \\ \(16.6\pm 6.44\) & \(0.2130.025\) & \(0.2890.018\) & \(0.220\pm 0.024\) & 0.431\(\pm 0.010\) & reference matched sample \\ Peripheral-vestibular & \(10.3\pm 3.13\) & \(9.78\pm 2.15\) & \(\mathbf{9.65\pm 2.00}\) & \(9.93\pm 2.01\) & 0.145 & 0.059 & - \\
9.67 \(\pm 3.46\) & \(0.4160.011\) & \(0.8720.000\) &  
Figure 3: _Cont._  
Figure 2: (**A–D**) Longitudinal changes of the postural subsystems compared with the matched reference sample based on percentile (P25, P50, P75) analysis. Total effects and relevant (\(\eta_{\text{p}}^{2}\geq 0.10\)) partial effects are reported. The WDI was the parameter with the largest improvement (\(\eta_{\text{p}}^{2}=0.152\)) over the total time of the investigation. The HTO induced a short-term enhancement of the forefoot load (exam 1: 54.2 vs. exam 2: 57.2%, \(\eta_{\text{p}}^{2}=0.272\); Table 3, Figure 4A) and the load of the unaffected side (left-sided load, injury on the right side: exam 1: 52.9 vs. exam 2: 54.5%; Table 3). Figure 3: (**A–C**) Longitudinal changes of bilateral (stability indicator (ST) weight distribution index (WDI); synchronization (Synch)) posturographic parameters compared with the matched reference sample based on percentile (P25, P50, P75) analysis. Total effects and relevant (\(\eta_{\text{p}}^{2}\geq 0.10\)) partial effects are reported. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Parameter (\%)**} & \multicolumn{4}{c}{**Examinations (Exam)**} & \multicolumn{4}{c}{**Variance Analysis**} \\ \cline{2-9}  & **Exam 1** & **Exam 2** & **Exam 3** & **Exam 4** & **Comparison of Exam 1 vs. Exam 4** & **Comparison of Adjacent Exams** \\ \cline{2-9}  & **Preoperative** & **6 Weeks Postoperative** & **12 Weiss Postoperative** & **6 Months Postoperative** & **p** & \(\eta_{\pi}\)2 & \(\eta_{\pi}\)2 \\ \hline \hline \multicolumn{9}{c}{Patients with left-sided injury (n = 12)} \\ \hline \hline \multicolumn{9}{c}{} \\ \hline \hline \multicolumn{9}{c}{} \\ \hline \hline \multicolumn{9}{c}{} \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Descriptive longitudinal comparison, analysis of variance and calculation of effect size (\(\eta_{\mathrm{p}}\)2) for unilateral Interactive Balance System (IBS) parameters depending on the side of injury/correction (left: n = 12; right: n = 20). Based on the comparison of adjacent examinations only significant differences are reported. The highest time effects between adjacent examinations (patients with left-sided injury) were detected for the mediolateral weight distribution between exam 2 vs. exam 3 postoperatively (\(\eta_{\text{p}}{}^{2}=0.636\)) and exam 2 vs. exam 4 (\(\eta_{\text{p}}{}^{2}=0.486\); Table 3). From exam 2 to exam 3, both subsamples showed the largest improvements (left-sided injury: 4.8%, \(\eta_{\text{p}}{}^{2}=0.636\); right-sided injury: 2.8%, \(\eta_{\text{p}}{}^{2}=0.420\)) concerning the mediolateral weight distribution in the sense of a more powerful balance.