Table footnote of Latex table environment in r markdown - latex

Question

As you can see the problem in table notes in the figure below. I generated the latex code from stargazer function and manually adjusted it to meet my requirement. The table note troubled me however. how do I format the note to be the same height with the note contexts.
My latex code looks like below
\begin{table}[h] \centering
\begin{threeparttable}[b]
\caption{Regression results}
\label{results}
\begin{tabular}{#{\extracolsep{5pt}}lccccc}
\\[-1.8ex]\hline
\hline \\[-1.8ex]
& (1) & (2) & (3) & (4) & (5) \\
\hline\\[-1.8ex]
& \multicolumn{5}{c}{A. Daily Max 8-hour Ozone Concentration} \\
\hline \\[-1.8ex]
TreatedPost & 0.034$^{***}$ & 0.006 & $-$0.063$^{***}$ & $-$0.098$^{***}$ & $-$0.105$^{***}$ \\
& 0.012 & (0.007) & (0.017) & (0.023) & (0.023) \\
& & & & & \\[-1.8ex]
\hline\\[-1.8ex]
& \multicolumn{5}{c}{B. Daily PM2.5} \\
\hline \\[-1.8ex]
TreatedPost & $-$0.245$^{***}$ & $-$0.374$^{***}$ & $-$0.505$^{***}$ & 0.203$^{***}$ & 0.230$^{**}$ \\
& 0.051 & (0.025) & (0.053) & (0.067) & (0.080) \\
& & & & & \\[-1.8ex]
\hline \\[-1.8ex]
County fixed & & Yes & Yes & Yes & Yes \\
Time fixed & & & Yes & Yes & Yes \\
County-specific trend & & & & Yes & Yes \\
Climate control & & & & & Yes \\
\hline \\[-1.8ex]
\hline \\
\end{tabular}
\begin{tablenotes}
\item[Note:] In the table, column (1)-(5) represent different models. Column (1) refers to a simple linear model; Column(2) indicates a panel data regression with county-fixed effect; Column(3) represents a panel data model with county- and time-fixed effect; Column (4) introduces county-specific time trend; Column (5) furture includes climate control variables. For panel data models, errors are clustered at county level. {$^{*}$p$<$0.1; $^{**}$p$<$0.05; $^{***}$p$<$0.01}
\end{tablenotes}
\end{threeparttable}
\end{table}