Statistical Analysis
Coding and statistical analyses of data were performed on the computer, using the Statistical Package for the Social Science 22.0 software (SPSS, Inc., Chicago, IL, USA). Descriptive statistical data for continuous variables were expressed as mean, median, standard deviation, percentage, minimum, and maximum values. The Mann–Whitney U test, the Wilcoxon test, and Spearman’s correlation analysis were used to analyze and compare the data. In all analyses, the level of statistical significance was considered to be 0.05.