Statistical Analysis

Statistical analysis was performed using SPSS version 22.0. Kolmogorov–Smirnov/Shapiro–Wilk tests were used to determine the normality of the distribution of data. The descriptive data were presented as means, standard deviations, and ordinal variables. The Mann–Whitney U-test was used to evaluate non-parametric statistical significance between the groups. The Friedman test was used for finding the differences in non-parametric repeated measures. Post hoc analysis with Wilcoxon signed-rank test was conducted with a Bonferroni correction applied for the intragroup comparison. The Pearson Chi-square statistic was used for testing relationships between categorical variables. The results were evaluated using the 95% confidence intervals and p<0.05 was statistically significant.