I'm using estout (esttab actually) to produce a table in Latex from Stata. I'm using the dcolumn package to align the decimal places in my table. 

I want to override the alignment for a single row; to be specific the number of observations row. Is there a way of doing this? Or, equivalents, if there a way to prefix each element in a row with "\multicolumn{1}{c}{" and suffix with "}", which would override the dcolumn alignment?

Example:

```
\begin{table}[htbp]\centering
\caption{My Table}
\begin{tabular}{l*{3}{D{.}{.}{-1}}}
\toprule        
                    &\multicolumn{1}{c}{Mean/s.d.}&\multicolumn{1}{c}{Mean/s.d.}&\multicolumn{1}{c}{Mean/s.d.}\\
\midrule
Var A               &        8.68&        8.51&        8.92\\
                    &        2.42&        2.51&        2.26\\
Var B               &        2.14&        1.98&        2.37\\
                    &        1.33&        1.29&        1.35\\
\midrule
Observations        &       38040&       22054&       15986\\
\bottomrule
\end{tabular}
\end{table}

```

Thanks!