\begin{table}%t1
   %\centering
\par
\caption{Clustering measures and numbers for the observed star-forming regions for prestellar cores (p), Class~1, 2, 3 sources, and all YSOs. (Note that the total number of YSOs is larger
than the sum of objects in the individual classes, because it contains Class~0 sources and objects
with unclear classification not considered in the analysis of the individual classes.)
For details see the discussion in Sect.~\ref{sec:discuss_obs}.
 \label{tab:obs_results}}
\begin{tabular}{l r r r r r r r r r r r r r }
\hline
\hline
Region & Class & $n$ & $s$ [$'$] & $s$ [pc] & $m$ [$'$] & $m$ [pc] & $\bar{s}$
             & $\bar{m}$ & $Q$  & $\bar{s}^*$ & $\bar{m}^*$ & $Q^*$ & $\xi$\\
\hline
$\rho$ Ophiuchi & p & 98 & 20.45 & 0.83 & 2.71 & 0.11 & 0.67 & 0.55 & 0.82 & 0.49 & 0.40 & 0.81 & 1.36 \\
          & 1 & 15 & 11.82 & 0.48 & 3.15 & 0.13 & 1.13 & 0.68 & 0.60 & 0.77 & 0.43 & 0.56 & 1.47 \\
          & 2 & 111& 15.86 & 0.65 & 2.25 & 0.09 & 0.69 & 0.58 & 0.83 & 0.54 & 0.63 & 1.15 & 1.27 \\
          & 3 & 77 & 16.25 & 0.66 & 2.53 & 0.10 & 0.82 & 0.63 & 0.76 & 0.70 & 0.66 & 0.93 & 1.17 \\
          & all & 205 & 15.63 & 0.64 & 1.67 & 0.07 & 0.67 & 0.57 & 0.85 & 0.53 & 0.45 & 0.85 & 1.28 \\
\hline
Serpens   & 1 & 19 & 3.43 & 0.26 & 1.12 & 0.09 & 0.99 & 0.82 & 0.83 & 0.27 & 0.22 & 0.79 & 3.61 \\
          & 2 & 18 & 7.85 & 0.59 & 1.74 & 0.13 & 0.74 & 0.61 & 0.82 & 0.52 & 0.42 & 0.80 & 1.42 \\
          & all & 80 & 5.98 & 0.45 & 1.06 & 0.08 & 0.60 & 0.54 & 0.90 & 0.37 & 0.32 & 0.89 & 1.63 \\
\hline
Taurus    & p & 52 & 281.0 & 11.47 & 45.88 & 1.87 & 0.77 & 0.48 & 0.62 & 0.59 & 0.36 & 0.61 & 1.29 \\
          & 1 & 25 & 265.6 & 10.84 & 73.18 & 2.98 & 0.83 & 0.60 & 0.73 & 0.59 & 0.41 & 0.70 & 1.39 \\
          & 2 &108 & 333.5 & 13.62 & 34.30 & 1.40 & 0.69 & 0.41 & 0.59 & 0.43 & 0.54 & 1.26 & 1.61 \\
          & 3 & 72 & 414.4 & 16.96 & 52.99 & 2.16 & 0.84 & 0.51 & 0.60 & 0.77 & 0.63 & 0.82 & 1.09 \\
          & all & 197 & 356.8 & 14.58 & 25.98 & 1.06 & 0.67 & 0.39 & 0.58 & 0.46 & 0.27 & 0.58 & 1.45 \\
\hline
IC 348    & all & 288 & 6.86 & 0.63 & 0.66 & 0.06 & 0.56 & 0.52 & 0.93 & 0.49 & 0.45 & 0.92 & 1.16 \\
\hline
Chamaeleon~I & all & 180 & 41.51 & 1.81 & 3.74 & 0.16 & 0.55 & 0.37 & 0.68 & 0.50 & 0.34 & 0.68 & 1.32 \\
\hline
\end{tabular}
\end{table}