\documentclass{article}
\usepackage{threeparttable}
\usepackage{multirow}
\usepackage{booktabs}
\begin{document}
\begin{table}[!ht]
\setlength\tabcolsep{0pt}
\centering
\begin{threeparttable}
\begin{tabular}{@{\extracolsep{2ex}}*{5}{lcccc}}
\toprule
 &  & \multicolumn{3}{c}{\textbf{parameters}} \\
\cmidrule{3-5}
 & \textbf{Total} & T\textsubscript{max} & C\textsuperscript{max} & \begin{tabular}{@{}c@{}}One Line \\ Another Line\end{tabular} \\
\midrule
\textbf{value} &  &  &  &  \\
\hspace{12.0pt}Mean (SD) & 6.5 (3.61) & 2.5 (1.29) & 6.5 (1.29) & 10.5 (1.29) \\
\hspace{12.0pt}Median [Min, Max] & 6.5 [1, 12] & 2.5 [1, 4] & 6.5 [5, 8] & 10.5 [9, 12] \\
\bottomrule
\end{tabular}
\end{threeparttable}
\end{table}
\end{document}