\begin{table}%T3
\caption{\label{tab3}Average [O/H] values from the different indicators, with the corresponding dispersions, for the 
set of planet host stars and the comparison sample.}
%\centering
\par
\begin{tabular}{cccr}
\hline\hline
Indicator & $\langle[$O/H$]\rangle\pm$ rms & $\langle[$O/H$]\rangle\pm$ rms & Difference \\
 &  (comp. sample) & (planet hosts) & \\
\hline 
OH         & $-0.07\pm0.16$ & $ 0.10\pm0.16$ & 0.17 \\
$[$O~I$]$ & $ 0.07\pm0.17$ & $ 0.12\pm0.16$ & 0.05 \\
NLTE O~I  & $-0.14\pm0.18$ & $-0.16\pm0.17$ &--0.02 \\
LTE O~I   & $ 0.08\pm0.20$ & $ 0.15\pm0.17$ & 0.07 \\
mean (NLTE) & $-0.07\pm0.16$ & $ 0.03\pm0.18$ & 0.10 \\
mean (LTE)  & $-0.07\pm0.16$ & $ 0.12\pm0.16$ & 0.19 \\
\hline	      
\end{tabular} 
\end{table}