Statistical analysis
Count data can be described using frequencies and percentages. For normally distributed continuous data, the mean ± standard deviation (x ± s) is used to describe the data, and between-group comparisons are made using independent-samples t-test. For between-group comparisons of count data, the chi-square test is used. If the data are skewed, the median and interquartile range are used to describe the data, and non-parametric tests are used for comparisons. The data were analyzed by SPSS version 26.0 for Windows (SPSS Inc., Chicago, IL, USA). A value of 