\begin{table}[t]
\centering
\scriptsize
\caption{Ablation on graph construction. Values are reported as mean\textsubscript{std} over 5-fold cross-validation (\%).}
\label{tab:graph-ablation}
\setlength{\tabcolsep}{3pt}
\renewcommand{\arraystretch}{1.2}
\begin{tabular}{l|cc|cc|cc|cc}
\toprule
\multirow{2}{*}{\textbf{Graph Variant}} &
\multicolumn{2}{c|}{\textbf{Appendiceal Cancer}} &
\multicolumn{2}{c|}{\textbf{TCGA-NSCLC}} &
\multicolumn{2}{c|}{\textbf{TCGA-ESCA}} &
\multicolumn{2}{c}{\textbf{BRACS}} \\
& \textbf{BAcc} & \textbf{AUC} & \textbf{Accuracy} & \textbf{AUC} & \textbf{Accuracy} & \textbf{AUC} & \textbf{BAcc} & \textbf{AUC}\\
\midrule
Feature kNN &
90.97\textsubscript{4.82} & 96.45\textsubscript{3.86} &
92.70\textsubscript{1.71} & 97.21\textsubscript{1.17} &
98.02\textsubscript{1.62} & 99.91\textsubscript{0.17} &
32.30\textsubscript{2.55} & 77.13\textsubscript{1.27}\\
Spatial kNN &
91.79\textsubscript{6.22} & 96.06\textsubscript{4.22} &
93.10\textsubscript{1.24} & 97.35\textsubscript{1.37} &
97.35\textsubscript{2.49} & 99.45\textsubscript{0.68} &
33.41\textsubscript{3.49} & 77.49\textsubscript{1.70}\\
Hybrid ($d_{spa}{=}24$) &
\textbf{92.56\textsubscript{6.36}} & \textbf{96.41\textsubscript{1.94}} &
92.60\textsubscript{1.56} & \textbf{97.65\textsubscript{0.90}} &
\textbf{98.02\textsubscript{1.62}} & \textbf{99.91\textsubscript{0.17}} &
\textbf{33.76\textsubscript{6.07}} & \textbf{77.61\textsubscript{0.95}} \\
Hybrid ($d_{spa}{=}15$) &
90.78\textsubscript{6.05} & 94.23\textsubscript{3.69} &
\textbf{93.51\textsubscript{0.75}} & 97.15\textsubscript{1.47} &
98.02\textsubscript{1.62} & 99.54\textsubscript{0.93} &
31.54\textsubscript{2.58} & 77.00\textsubscript{2.09} \\
Node-permuted &
92.46\textsubscript{6.14} & 96.08\textsubscript{3.53} &
92.80\textsubscript{0.99} & 97.70\textsubscript{1.00} &
98.02\textsubscript{1.62} & 99.83\textsubscript{0.21} &
33.53\textsubscript{3.98} & 76.95\textsubscript{3.98} \\
\bottomrule
\end{tabular}
\end{table}