The 2007 Number Cruncher Statistical System (NCSS, Kaysville, Utah, USA) program was used for statistical analysis. The Student t-test and Mann-Whitney U test were used for descriptive statistical methods (mean, standard deviation, median, frequency, ratio, minimum, maximum) in two groups, as well as the normal distribution of quantitative data. The Kruskal-Wallis test and Mann-Whitney U test were used in the comparison of three groups with no normal distribution. The Pearson Chi-square test was used to evaluate qualitative data, and Spearman's correlation analysis was used to evaluate intervariable relationships. The Friedman and Wilcoxon signed ranks tests were used in the evaluation of three or more follow-up parameters without normal distribution. Diagnostic screening tests (sensitivity, specificity) and receiver operating characteristic (ROC) analysis were used to determine the cutoff value for age. Significance was evaluated at the level of p < (0.01).