Data analysis
Data were analyzed using the statistical package SPSS version 14.0 (SPSS Inc., Chicago, IL, USA). Continuous variables (such as height, weight) were presented as means and standard deviations, whereas categorical variables (such as socio demographic features and health screening items) as frequencies and percentages. Comparison of children's descriptive features and findings from the screenings were evaluated with Chi-Square or Fisher's exact test. A two-sided p value of less than 0.05 was considered to indicate statistical significance.