Statistical analysis
For statistics, data normality was evaluated through the Kolmogorov-Smirnov test. Variables are presented as mean ± standard deviation or median and interquartile range (IQ), following their distribution. Categorical variables are shown in absolute and relative frequencies. Comparisons between groups were performed using the one-way analysis of variance (ANOVA), followed by the Bonferroni post-hoc test. Associations were evaluated using the Pearson Chi-square test. All analyses and data processing were performed using SPSS version 18.0 (SPSS Inc., USA) and the significance level adopted was P ≤0.05.