Include footnote to table that is within tcolorbox

Question

I have put a table inside a tcolorbox using this post by @Ignasi.

However, I am having trouble putting a footnote—or really any text—below the table. Whatever text I write after \end{tabular} is put to the RIGHT of the table, but I want this text to be BELOW the table.

If possible, I would like to keep the tcolorbox within a minipage, as I have found it easier to align 2 minipages than to align 2 tcolorboxs. (But maybe there is an easy way to align 2 tcolorboxs, and I am just ignorant of it.)

Any thoughts on how to get text that is written after the \end{tabular} command to appear BELOW the table?

\documentclass{article}
\usepackage[table]{xcolor}
\usepackage{booktabs}
\usepackage[left=19mm, right=19mm,top=18mm,bottom=18mm,includehead=true]{geometry}
\usepackage{caption}
\usepackage{tcolorbox, varwidth}
\tcbuselibrary{theorems}
\tcbuselibrary{skins}
\newtcolorbox[blend into=tables]{TableStyle1}[2][]{title={#2}, before upper=\centering, #1}
\begin{document}
Some introductory text....
\begin{minipage}{0.33\textwidth}
\begin{TableStyle1}[capture=hbox, colback=white, colframe=blue!15, coltitle=black, fonttitle=\bfseries]{Proposed frequency of CT scans}
\setlength{\extrarowheight}{4mm}
\renewcommand{\tabcolsep}{3mm}
\begin{tabular}{m{24mm} m{24mm} m{16mm}}
Date & Scan & mSv \
\midrule
early Jan 2024 & CT CAP & 24 mSv \
May 2024 & CT AP | CXR & 16 mSv \
Nov 2024 & CT AP | CXR & 16 mSv\
Aug 2025 & CT CAP & 24 mSv \
Aug 2026 & CT AP | CXR & 16 mSv \
Aug 2027 & CT AP | CXR & 16 mSv\
Aug 2028 & CT AP | CXR & 16 mSv \
\textbf{TOTAL}& & \textbf{176 mSv} \
\end{tabular}
This total includes the 48 mSv already obtained from previous scans.
\end{TableStyle1}
\vspace{5mm}
\end{minipage}
Some more text....
\end{document}

Here is a screenshot of what I am getting currently:

Answer 1

First, turn off [collect=hbox]. All the minpage does is set the width. I put the "footnote" inside a \parbox to turn off the centering.

\documentclass{article}
\usepackage[table]{xcolor}
\usepackage{booktabs}
\usepackage[left=19mm, right=19mm,top=18mm,bottom=18mm,includehead=true]{geometry}
\usepackage{caption}
\usepackage{tcolorbox, varwidth}
\tcbuselibrary{theorems}
\tcbuselibrary{skins}
\newtcolorbox[blend into=tables]{TableStyle1}[2][]{title={#2}, before upper=\centering, #1}
\begin{document}
Some introductory text....
\begin{minipage}{0.5\textwidth}% set width of title
\begin{TableStyle1}[colback=white, colframe=blue!15, coltitle=black, fonttitle=\bfseries]{Proposed frequency of CT scans}
\setlength{\extrarowheight}{4mm}
\renewcommand{\tabcolsep}{3mm}
\begin{tabular}{m{24mm} m{24mm} m{16mm}}
Date & Scan & mSv \
\midrule
early Jan 2024 & CT CAP & 24 mSv \
May 2024 & CT AP | CXR & 16 mSv \
Nov 2024 & CT AP | CXR & 16 mSv\
Aug 2025 & CT CAP & 24 mSv \
Aug 2026 & CT AP | CXR & 16 mSv \
Aug 2027 & CT AP | CXR & 16 mSv\
Aug 2028 & CT AP | CXR & 16 mSv \
\textbf{TOTAL}& & \textbf{176 mSv} \
%\bottomrule
\end{tabular}
\par\medskip
%\hrule% show available space
\parbox{\textwidth}{% turn off centering
This total includes the 48 mSv already obtained from previous scans.}
\end{TableStyle1}
\vspace{5mm}
\end{minipage}
Some more text....
\end{document}

Answer 2

You can use \footnote, but without capture=hbox.

With minipage{0.33\linewidth], we have an Overfull \hbox of more than 97pt. You need 0.53\linewidth or reduce the widths of the table (you can also use the tabularx or tabularray packages)

\documentclass{article}
\usepackage[table]{xcolor}
\usepackage{booktabs}
\usepackage[left=19mm, right=19mm,top=18mm,bottom=18mm,includehead=true]{geometry}
\usepackage{caption}
\usepackage{tcolorbox, varwidth}
\tcbuselibrary{theorems}
\tcbuselibrary{skins}
\newtcolorbox[blend into=tables]{TableStyle1}[2][]{title={#2}, before upper=\centering, #1}

\begin{document}
Some introductory text....
\begin{minipage}{0.53\linewidth}%<-- this line
\begin{TableStyle1}[colback=white, colframe=blue!15, coltitle=black, fonttitle=\bfseries]{Proposed frequency of CT scans}
\setlength{\extrarowheight}{4mm}
\renewcommand{\tabcolsep}{3mm}
\begin{tabular}{m{24mm} m{24mm} m{16mm}}
Date & Scan & mSv \
\midrule
early Jan 2024 & CT CAP & 24 mSv \
May 2024 & CT AP | CXR & 16 mSv \
Nov 2024 & CT AP | CXR & 16 mSv\
Aug 2025 & CT CAP & 24 mSv \
Aug 2026 & CT AP | CXR & 16 mSv \
Aug 2027 & CT AP | CXR & 16 mSv\
Aug 2028 & CT AP | CXR & 16 mSv \
\textbf{TOTAL\footnote{This total includes the 48 mSv already obtained from previous scans.}}& & \textbf{176 mSv} \
\end{tabular}
\end{TableStyle1}
\vspace{5mm}
\end{minipage}%
Some more text....
\end{document}

Answer 3

You can use {NiceTabular} of nicematrix and its built-in command \tabularnote.

\documentclass{article}
\usepackage[table]{xcolor}
\usepackage{booktabs}
\usepackage[left=19mm, right=19mm,top=18mm,bottom=18mm,includehead=true]{geometry}
\usepackage{caption}
\usepackage{tcolorbox, varwidth}
\tcbuselibrary{theorems}
\tcbuselibrary{skins}
\usepackage{nicematrix}
\usepackage{enumitem}
\newtcolorbox[blend into=tables]{TableStyle1}[2][]{title={#2}, before upper=\centering, #1}

\begin{document}
Some introductory text....
\begin{minipage}{0.53\linewidth}%<-- this line
\begin{TableStyle1}[capture=hbox,colback=white, colframe=blue!15, coltitle=black, fonttitle=\bfseries]{Proposed frequency of CT scans}
\setlength{\extrarowheight}{4mm}
\renewcommand{\tabcolsep}{3mm}
\begin{NiceTabular}{m{24mm} m{24mm} m{16mm}}
Date & Scan & mSv \
\midrule
early Jan 2024 & CT CAP & 24 mSv \
May 2024 & CT AP | CXR & 16 mSv \
Nov 2024 & CT AP | CXR & 16 mSv\
Aug 2025 & CT CAP & 24 mSv \
Aug 2026 & CT AP | CXR & 16 mSv \
Aug 2027 & CT AP | CXR & 16 mSv\
Aug 2028 & CT AP | CXR & 16 mSv \
\textbf{TOTAL\tabularnote{This total includes the 48 mSv already obtained from previous scans.}}& & \textbf{176 mSv} \
\end{NiceTabular}
\end{TableStyle1}
\vspace{5mm}
\end{minipage}%
Some more text....
\end{document}