\begin{table}[ht]
\centering
\caption{Median boundary fraction (text proportion needed) per detector and confidence threshold.}
\label{tab:boundary}
\begin{tabular}{llll}
\toprule
Detector & Thr=0.50 & Thr=0.70 & Thr=0.90 \\
\midrule
InjecGuard & 0.181 & 0.185 & 0.188 \\
PIGuard & 0.181 & 0.185 & 0.188 \\
\bottomrule
\end{tabular}
\end{table}