Basic LaTeX table

gistfile1.txt

\documentclass{article}
\usepackage{booktabs} 
\usepackage{caption} 
\usepackage{array} 
\usepackage{float}
\usepackage[cm]{fullpage}

\begin{document}
\begin{tabular}{p{3.0cm}ccccc} 
\toprule
&  & Total Sample & Group A & Group B  & Test Statistic \\
Variable & Missing & (n = ) & (n = ) & (n = ) & \\ 
\cmidrule(lr){3-6}
\addlinespace[48pt]
\bottomrule


\end{tabular}
\end{document}