\begin{tabular}{@{}l*{3}{l}@{}}
\hline
  &\multicolumn{2}{l}{M1  }\tabularnewline
 &\multicolumn{1}{c}{Estimate}&\multicolumn{1}{c}{(S.E.)}\tabularnewline
 \hline
 \hline
  (Intercept) & 71.644 & (130.027) \tabularnewline
  ECAB & 1.813*** & (  0.333) \tabularnewline
  poly(MET, 2)1 & -81.909 & ( 52.684) \tabularnewline
  poly(MET, 2)2 & 123.039** & ( 42.723) \tabularnewline
  YOUNG & 1.407 & (  4.020) \tabularnewline
 \hline
 N&\multicolumn{1}{l}{48}  & \tabularnewline
 RMSE&40.190\tabularnewline
 $R^2$&0.573\tabularnewline
 adj $R^2$&0.533\tabularnewline
 \hline
\hline
 
 \multicolumn{3}{l}{  ${*  p}\le 0.05$${*\!\!*  p}\le 0.01$${*\!\!*\!\!*  p}\le 0.001$}\tabularnewline
 \end{tabular}