## 3 Results
The univariate regression analysis for the patients who underwent THA demonstrated that VAS and VHS at t0 was associated with better functional outcomes at 1 month after surgery. Table 5 shows these results. The multivariate regression analysis demonstrated that higher values of VHS at t3 were associated with better values of VAS and VHS at t0 (r = 0.095, \(p\) = 0.021). The univariate regression analysis for patients who underwent TKA shows that female gender and WOMAC at t0 were associated with better functional outcomes at t3. Table 6 shows the results. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**TKA** & **HBR** & \multicolumn{2}{c}{\(p\)**-Value**} & **CBR** & \multicolumn{2}{c}{\(p\)**-Value**} & **HBR vs. CBR** \\ \hline  & **Mean** & **SD** & \multicolumn{2}{c}{**Mean**} & **SD** & \\ \hline
**IADL t0** & 7.8 & 0.5 & \multicolumn{2}{c}{7.7} & 0.6 & 0.48 & 0.48 \\ \hline
**VAS t0** & 7.1 & 1.9 & \multicolumn{2}{c}{7.5} & 1.6 & \multicolumn{2}{c}{0.38} \\ \hline
**VAS t1** & 5.9 & 1.4 & \multicolumn{2}{c}{\(p<0.001\)} & 5.8 & 1.5 & \multicolumn{2}{c}{\(p<0.001\)} \\ \hline
**VAS t2** & 4.4 & 1.5 & \multicolumn{2}{c}{(VAS t0–t3)} & 4.2 & 1.3 & \multicolumn{2}{c}{(VAS t0–t3)} \\ \hline
**VAS t3** & 2.2 & 1.1 & \multicolumn{2}{c}{} & 2.4 & 0.9 & \multicolumn{2}{c}{0.44} \\ \hline
**WOMAC t0** & 45.2 & 13.6 & \multicolumn{2}{c}{\(49.7\)} & 14.1 & \multicolumn{2}{c}{0.21} \\ \hline
**WOMAC t1** & 35.5 & 10.9 & \multicolumn{2}{c}{\(p<0.001\)} & 37.1 & 9.4 & \multicolumn{2}{c}{\(p<0.001\)} \\ \hline
**WOMAC t2** & 24.7 & 7.2 & \multicolumn{2}{c}{(WOMAC t0–t3)} & 27.4 & 7.9 & \multicolumn{2}{c}{(WOMAC t0–t3)} \\ \hline
**WOMAC t3** & 16 & 6.7 & \multicolumn{2}{c}{\(18\)} & 7.5 & \multicolumn{2}{c}{0.28} \\ \hline \end{tabular}
\end{table} 
Table 4: Functional scores of patients who underwent total knee arthroplasty. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**THA** & **HBR** & \multicolumn{2}{c}{\(p\)**-Value**} & **CBR** & \multicolumn{2}{c}{\(p\)**-Value**} & **HBR vs. CBR** \\ \hline  & **Mean** & **SD** & \multicolumn{2}{c}{**Mean**} & **SD** & \\ \hline
**IADL t0** & 7.7 & 0.7 & \multicolumn{2}{c}{7.6} & 0.8 & 0.6 \\ \hline
**VAS t0** & 7.4 & 2 & \multicolumn{2}{c}{6.7} & 2.3 & \multicolumn{2}{c}{0.6} \\ \hline
**VAS t1** & 5.3 & 1.7 & \multicolumn{2}{c}{\(p<0.001\)} & 4.8 & 2.1 & \multicolumn{2}{c}{\(p<0.001\)} \\ \hline
**VAS t2** & 3.1 & 2.1 & \multicolumn{2}{c}{(VAS t0–t3)} & 3 & 1.6 & \multicolumn{2}{c}{(VAS t0–t3)} \\ \hline
**VAS t3** & 1.3 & 1.3 & \multicolumn{2}{c}{\(1.6\)} & 1 & \multicolumn{2}{c}{1} \\ \hline
**VHS t0** & 33.9 & 15 & \multicolumn{2}{c}{\(35.3\)} & 12.8 & \multicolumn{2}{c}{0.69} \\ \hline
**VHS t1** & 49.8 & 16.2 & \multicolumn{2}{c}{\(p<0.001\)} & 52.4 & 18.4 & \multicolumn{2}{c}{\(p<0.001\)} \\ \hline
**VHS t2** & 65.1 & 16.7 & \multicolumn{2}{c}{(VHS t0–t3)} & 64.8 & 14.6 & \multicolumn{2}{c}{(VHS t0–t3)} \\ \hline
**VHS t3** & 76.5 & 16.3 & \multicolumn{2}{c}{\(73.8\)} & 13.7 & \multicolumn{2}{c}{0.49} \\ \hline \end{tabular}
\end{table} 
Table 3: Functional scores of patients who underwent total hip arthroplasty. The multivariate regression analysis demonstrated that a better value of the WOMAC score at t3 was associated with the female gender and a better value of the WOMAC score at t0 (r = 0.319, \(p<0.001\)).