How to make one row longer in tabular?

Question

I'm using the tabular environment. I would like for one row (where I describe each subsection) to go horizontally across the table, and not to stay in one column. This is what I currently have:

\begin{center}
\begin{tabular}{p{4cm} p{13cm}}
\textbf{Table 1} I would like this to go across the table and not stay in column 1\\ \hline
\textit{Predisposing factors} \\ \hline
variable 1 & description \\
variable 2 & description \\
variable i & description \\
\textit{I would like this to go across the table as well} \\
\end{tabular}
\end{center}

I would really appreciate any help.

Answer 1

\begin{center}
\begin{table}
\begin{tabular}{p{4cm} p{13cm}}
\multicolumn{2}{l}{\textbf{Table 1} This will now go across the table} \hline
\textit{Predisposing factors} \\ \hline
variable 1 & description \\
variable 2 & description \\
variable i & description \\
\end{tabular}
\end{table}
\end{center}