Statistical analysis
REGRESSION
The database was created using double data entry. Statistical analyses were performed using the software Statistical Package for the Social Sciences® (SPSS, Inc., Chicago, IL, USA) version 22.0 for Windows. A descriptive analysis of continuous and categorical variables was performed. Qualitative characteristics were expressed as absolute numbers and percentages and Pearson’s chi-square test was used to assess differences in proportions. Parametric data were expressed as mean ± standard deviation (SD) and analyzed by Fisher’s exact test and ANOVA with Bonferroni’s post hoc test. Nonparametric data were expressed as median and interquartile ranges and analyzed using the Kruskal-Wallis test with Dunn’s post hoc test. To assess differences between variables with normal distribution between groups of children, ANOVA and Bonferroni post hoc tests were used. To analyze factors associated with adherence results, Poisson regression was used. The chi-square test was used to assess differences in proportions between different groups. A 5% significance level (p<0.05) and a 95% confidence interval were considered.