I suppose it's good that we all need TeX rather than R help now... in any
case, I'm running two models on unmatched and matched data, and I want to
show clearly which models correspond to which data by merging the columns
and applying "Unmatched" and "Matched" labels in the merged columns.
In case that didn't make sense, here's what I want to do, with 5 columns
total:
*| one || unmatched || matched | *
| one || mod1 | mod2 || mod1 | mod2 |
And here's my text thus far:
\begin{table}[h!]
\centering
\caption{Hazard Ratio Estimates}
\smallskip
\begin{threeparttable}
\begin{tabular}{c||c|c||c|c}
\hline \hline
\multicolumn{5}{|c||cc||cc}{& Unmatched Data & Matched Data} \\
& Cox & BTSCS & Cox & BTSCS \\
\hline
Fight in War $0\rightarrow1$ & 0.619 & 0.571 & 1.094 & 1.343 \\
Std. Err. & 0.062 & 0.049 & 0.197 & 0.187 \\
95 \% C.I. & (0.508, 0.746) & (0.481, 0.674) & (0.760, 1.525) &
(1.004,
1.737) \\
\hline
Initiate War $0\rightarrow1$ & 0.594 & 0.538 & 0.756 & 0.794 \\
Std. Err. & 0.096 & 0.072 & 0.189 & 0.174 \\
95 \% C.I. & (0.429, 0.798) & (0.411, 0.691) & (0.446, 1.190) &
(0.504,
1.174) \\
\hline
Defend in War $0\rightarrow1$ & 0.612 & 0.620 & 0.813 & 1.250 \\
Std. Err. & 0.086 & 0.071 & 0.165 & 0.200 \\
95 \% C.I. & (0.468, 0.795) & (0.488, 0.772) & (0.540, 1.181) &
(0.892,
1.673) \\
\hline\hline
\end{tabular}
\begin{tablenotes}
\item[a] Begin notes here
\end{tablenotes}
\end{threeparttable}
\end{table}