\begin{tabular}{lcccc}\hline\hline\multicolumn{5}{l}{\textbf{Dep. variable: $\Delta$ monthly visits}}\\ &\multicolumn{2}{c}{All users}&\multicolumn{2}{c}{Low attendance}\\ &\multicolumn{2}{c}{}&\multicolumn{2}{c}{users}\\ &Coeff. & Std. Err. & Coeff. & Std. Err.\\
\cmidrule(l{4pt}r{4pt}){2-3}\cmidrule(l{4pt}r{4pt}){4-5}
$\Delta$ Treated    &       0.095   &     (0.818)&       0.025   &     (1.052)\\
Constant            &      -1.482***&     (0.260)&      -1.028***&     (0.312)\\
\hline
R$^2$               &       0.000   &            &       0.000   &            \\
Observations        &         158   &            &          91   &            \\
\hline\hline\end{tabular}
