\begin{table}%t3 
\caption{The derived global characteristics of BCDGs compared with the 
Salzer et~al. (\cite{SRWMB02}) sample.}\label{tab3} 
%\centering
\par
\begin{tabular}{rrrrrrr} 
\hline 
\hline
\multicolumn{1}{c}{ }& 
\multicolumn{3}{c}{BCDG sample}& 
\multicolumn{3}{c}{Salzer sample}  
\\ 
\multicolumn{1}{c}{ }& 
\multicolumn{1}{c}{median}& 
\multicolumn{1}{c}{min}& 
\multicolumn{1}{c}{max}& 
\multicolumn{1}{c}{median}& 
\multicolumn{1}{c}{min}& 
\multicolumn{1}{c}{max} 
\\  
\hline 
$A_{0}$ [kpc] &  3.1& 1.0& 7.5 & 3.2 & 0.5& 11 \\ 
$M_{B}$       &  --15.5& --12.4& --17.4 & --16.1& --12& --17.5  \\ 
$M_{{\rm HI}}$ [10$^{8}~M_{\odot}]$&  1.5 & 0.9& 14.5& 3.0& 0.2& 18 \\ 
$W_{50}$ [km~s$^{-1}$]      & 58& 29& 190& 88& 30& 220  \\ 
\hline
\end{tabular} 
\end{table}