Statistical analysis
The data were analysed by SPSS 28.0 statistical software. Normally
distributed measurement data are presented as
x±s, and an independent-sample t
test was used for comparisons between groups. Quantitative data with a
skewed distribution are presented as the median and quartile, and the
Mann‒Whitney test was used for comparisons among groups. Enumerated data
are presented as percentiles; the χ2 test was used for comparisons among
three groups, and the corrected Bonferroni test was used for pairwise
comparisons between groups. Differences were considered statistically
significant at P < 0.05.