## 3 Results
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{\begin{tabular}{c} **Preoperative** \\ **Diagnosis** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **Patients** \\ **N\({}^{\circ}\)** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **\% of** \\ **Total** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **FU** \\ **(Months)** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **Oxford** \\ **(Women)** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **EQ-Sore** \\ **(OKS)** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **Knee** \\ **VS** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **Range** \\ **Society** \\ **Sore** \\ **(KSS)** \\ \end{tabular} } \\ \hline \multirow{2}{*}{\begin{tabular}{c} **Aseptic** \\ **loosening** \\ \end{tabular} } & \multirow{2}{*}{25} & \multirow{2}{*}{29.4\%} & 105.55 & 72.45 & \multirow{2}{*}{18} & 38.36 & 60.0 & 0.81 & 84.0 & 102.0\({}^{\circ}\) \\  & & & (88.97–11745) & (69.94–11745) & (72\%) & (35.97–114288) & (6.0) & (0.74–114288) & (81.0–114288) & (94.0–114288) & (94.0–114288) & (94.0–114288) \\ \hline \multirow{2}{*}{\begin{tabular}{c} **Malpositioning** \\ \end{tabular} } & \multirow{2}{*}{24} & \multirow{2}{*}{28.2\%} & 100.28 & 70.68 & \multirow{2}{*}{18} & 36.08 & 56.0 & 0.72 & 56.5 & 94.0\({}^{\circ}\) \\  & & (79.66–110816) & (64.40–114288) & (75\%) & (26.44–114288) & (48.0–114288) & (0.67-114288) & (49.5–114288) & (88.0–114288) \\ \hline \multirow{2}{*}{\begin{tabular}{c} **Infection** \\ \end{tabular} } & \multirow{2}{*}{20} & \multirow{2}{*}{23.5\%} & 92.15 & 68.41 & \multirow{2}{*}{13} & 24.82 & 43.0 & 0.44 & 63.5 & 88.5\({}^{\circ}\) \\  & & (82.34–11288) & (62.27–14288) & (65\%) & (17.4–114288) & (36.5–114288) & (36.5–114288) & (35.0–114288) & (77.5–114288) & (77.5–114288) & (94.0–1142888) \\ \hline \multirow{2}{*}{\begin{tabular}{c} **Instability** \\ \end{tabular} } & \multirow{2}{*}{9} & \multirow{2}{*}{10.6\%} & 97.16 & 74.20 & \multirow{2}{*}{7} & 31.9 & 39.0 & 0.77 & 66.0 & 98.0\({}^{\circ}\) \\  & & (73.06–110816) & (70.26–114288) & (78\%) & (27.15–114288) & (36.0–1142888) & (0.75–114288) & (63.0–114288) & (85.0–114288) & (85.0–1142888) & (85.0–1142888) & (71.0) & 104.0\({}^{\circ}\) \\ \hline \multirow{2}{*}{\
\begin{tabular}{c} **Periprosthetic** \\ **fracture** \\ \end{tabular} } & \multirow{2}{*}{8.2\%} & 102.12 & 67.26 & \multirow{2}{*}{7} & 43.25 & 73.0 & 0.71 & 83.0 & 105.0\({}^{\circ}\) \\  & & (88.29–114288) & (59.15–114288) & (100\%) & (32.68–114288) & (67.0–114288) & (67.0–114288) & (72.0–1142888) & (96.0–1142888) \\ \hline \multirow{2}{*}{
\begin{tabular}{c} **Periprosthetic** \\ **fracture** \\ \end{tabular} } & \multirow{2}{*}{7} & \multirow{2}{*}{8.2\%} & 125.00 & 74.11 & \multirow{2}{*}{100\%} & 43.25 & 73.0 & 0.71 & 83.0 & 105.0\({}^{\circ}\) \\  & & (88.29–114288) & (59.15–114288) & (100\%) & (32.68–114288) & (67.0–114288) & (68.0–1142888) & (72.0–1142888) & (96.0–1142888) \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Main demographic and clinical data of the study. The Kruskal-Wallis test indicated statistically significant differences among the medians of the groups of the outcomes (Table 3, \(p<0.05\)). From a purely descriptive point of view, the difference values of the functional outcomes in preoperative-cause-of-revision groups are shown in (Table 1). For the Oxford knee score (OKS), the highest median value was in the periprosthetic fracture group (43.25, IQR 32.7-45.3) and the lowest median value was in the infection group (24.8, IQR 17.4-34.8). For the EQ-VAS, the highest median value was in the periprosthetic fracture group (73.0, IQR 67.0-78.0) and the lowest median value was in the instability group (39.0, IQR 36.0-48.0). For the EQ-5D-5L, the highest median value was in the aseptic loosening group (0.81, IQR 0.74-0.85) and the lowest median value was in the infection group (0.44, IQR 0.32-0.60).