2.5. Statistical Analysis
SPSS (Statistical Package of Social Sciences) version 21 for Windows (SPSS, Inc., Chicago, IL, USA) was used to conduct statistical analysis. Numbers and percents were used to describe quantitative data (n, %). When applicable, the data were first evaluated for normality using the Shapiro–Wilk test or the Kolmogorov–Smirnov test. For normally distributed data, the mean ± standard deviation (SD) was used, and for non-normally distributed data, the median (interquartile range) was used. When comparing two groups with quantitative normally distributed data, the Independent Samples 