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Bartman, thanks for all your replies, they helped me!

Bartman,
here I send an example of one table result with more columns and rows:

\documentclass{article}

\usepackage{
booktabs,
rotating, %% for sideways environment. Provides the \captionof command and increases the space between table and caption
caption,
showframe, %% draws the page layout ...

Bartman, thanks for you reply!
I replicated your code, and it works. Now I have two questions:
Q1 - About this command line
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
I don't know exactly its meaning, could you explain me its function? and also why did you move it outside tabular environment ...

Hi everyone!,
I spent a while reading the guide for beginners, recomendations to post and some published posts before I write my first post. I hope my questions complying with the rules.
I'm working in Stata and saving the table results using booktabs command. The real size of the table has 8 ...