Statistical analysis
All statistical analyses were performed using the SPSS 25.0 software.
Categorical data were expressed as percentages and values, and numerical
data with a normal distribution were expressed as mean±standard
deviation. Otherwise, median and interquartile range were used to
express data with a skewed distribution. Quantitative data were compared
using t-test. and analysis of variance (ANOVA) was performed for
multiple comparisons among groups with post hoc tests. A two-sided test
was used, and statistical significance was set at P<0.05.