Cost-effectiveness analysis
Incremental cost-effectiveness ratio (ICER) was used.
\begin{equation}
ICER=\frac{cost\ Day\ Case\ Tonsillectomy-cost\ inpatient}{Effectiveness\ DayCase\ Tonsillectomy-Effectiveness\ inpatient}\nonumber \\
\end{equation}Data analysis was performed using Tree Age and Excel 2016 software.
Besides, chi-square and independent t-tests (p <0.05) were
used for data analysis.