\begin{table}%t2
\caption{\label{t:delta}Summary of differences in colour and metallicity between \mbox{populations}.}
\par
%\centerline
{\small
\begin{tabular}{l cccc}
\hline\hline
Sample & $\Delta(V-K)_{\rm IP}$  & $\Delta(V-K)_{\rm EP}$
              & $\Delta{\rm [Fe/H]_{IP}}$  & $\Delta{\rm [Fe/H]_{EP}}$ \\
\hline
 all           &  --0.003 &--0.037  & 0.000 & 0.027 \\
 all(+corr)$^1$      &    --    &--0.050  &   --   &    --  \\
NGC~2808       &  --0.036 &--0.044  & 0.046 & 0.084 \\
NGC~2808(+corr)$^1$  &  --0.049 &--0.057  &   --   &    --  \\
\hline
\end{tabular}}
\tablefoot{$^1$ With correction for the CO bands.}
\end{table}