begin{landscape}
begin{table}[]
caption{Pairwise Pearson correlation coefficients among EEG indexes}
label{tab:my-table}
begin{tabular}{|ll|ll|ll|ll|ll|}
hline
                                                                  &   & Delta phase deviation             &              & Beta power modulation quadratic coefficient &             & Beta power modulation vertex time point &              & Delta-beta dPACz                 &    \ cline{3-10}
                                                                  &   & multicolumn{1}{p{2cm}|}{L}            & R            & multicolumn{1}{p{2cm}|}{L}                      & R           & multicolumn{1}{p{2cm}|}{L}                  & R            & multicolumn{1}{p{2cm}|}{L}           & R  \ hline
multicolumn{1}{|p{2cm}|}{Delta phase deviation}                       & L & multicolumn{1}{p{2cm}|}{--}           & --           & multicolumn{1}{p{2cm}|}{--}                     & --          & multicolumn{1}{p{2cm}|}{--}                 & --           & multicolumn{1}{p{2cm}|}{--}          & -- \ cline{2-10}
multicolumn{1}{|p{2cm}|}{}                                            & R & multicolumn{1}{p{2cm}|}{.149 ± .044}  & --           & multicolumn{1}{p{2cm}|}{--}                     & --          & multicolumn{1}{p{2cm}|}{--}                 & --           & multicolumn{1}{p{2cm}|}{--}          & -- \ hline
multicolumn{1}{|p{2cm}|}{Beta power modulation quadratic coefficient} & L & multicolumn{1}{p{2cm}|}{-.010 ± .014} & -.016 ± .013 & multicolumn{1}{p{2cm}|}{--}                     & --          & multicolumn{1}{p{2cm}|}{--}                 & --           & multicolumn{1}{p{2cm}|}{--}          & -- \ cline{2-10}
multicolumn{1}{|p{2cm}|}{}                                            & R & multicolumn{1}{p{2cm}|}{-.008 ± .012} & .009 ± .015  & multicolumn{1}{p{2cm}|}{.103 ± .020}            & --          & multicolumn{1}{p{2cm}|}{--}                 & --           & multicolumn{1}{p{2cm}|}{--}          & -- \ hline
multicolumn{1}{|p{2cm}|}{Beta power modulation vertex time point}     & L & multicolumn{1}{p{2cm}|}{-.014 ± .015} & -.028 ± .017 & multicolumn{1}{p{2cm}|}{.030 ± .040}            & .027 ± .015 & multicolumn{1}{p{2cm}|}{--}                 & --           & multicolumn{1}{p{2cm}|}{--}          & -- \ cline{2-10}
multicolumn{1}{|p{2cm}|}{}                                            & R & multicolumn{1}{p{2cm}|}{-.009 ± .015} & -.028 ± .023 & multicolumn{1}{p{2cm}|}{-.011 ± .022}           & .024 ± .023 & multicolumn{1}{p{2cm}|}{.050 ± .020}        & --           & multicolumn{1}{p{2cm}|}{--}          & -- \ hline
multicolumn{1}{|p{2cm}|}{Delta-beta dPACz}                            & L & multicolumn{1}{p{2cm}|}{-.071 ± .018} & -.005 ± .018 & multicolumn{1}{p{2cm}|}{.148 ± .017}            & .014 ± .016 & multicolumn{1}{p{2cm}|}{-.008 ± .016}       & -.028 ± .011 & multicolumn{1}{p{2cm}|}{--}          & -- \ cline{2-10}
multicolumn{1}{|p{2cm}|}{}                                            & R & multicolumn{1}{p{2cm}|}{-.039 ± .016} & -.028 ± .016 & multicolumn{1}{p{2cm}|}{.031 ± .015}            & .181 ± .021 & multicolumn{1}{p{2cm}|}{.019 ± .019}        & .016 ± .026  & multicolumn{1}{p{2cm}|}{.026 ± .021} & -- \ hline
end{tabular}
end{table}
end{landscape}