Statistical analysis
Data tabulation and analysis were performed on MS Office Excel 2016 (Microsoft Office Professional Plus 2016, Microsoft, USA) and SPSS v. 24 (IBM SPSS. Statistics Inc, USA), respectively. The Kolmogorov–Smirnov test was used to assess data normality. Kruskal–Wallis test, followed by post hoc pairwise comparisons using the Dunn-Bonferroni approach, was used to compare the differences between the groups. Difference in the dichotomous variable between two related groups was evaluated using McNemar test, while paired-sample t-test was used for continuous dependent variable. For the categorical data, Pearson’s Chi-square test was used to assess the differences among the groups. The statistical significance level for all tests was 0.05, except for the adjustment at 