Statistical Analysis
Results were summarized by standard descriptive statistics and shown as
medians and interquartile range (IQR) for continuous variables, and
percentages for nominal variables. Differences between groups were
evaluated using the Mann–Whitney U test for continuous variables and
chi-square tests for categorical variables, as appropriate. Tests were
conducted using Stata, version 17 (StataCorp) with p-values of less than
0.05 considered significant.