The investigators will use the Statistical Programme Statistic Program for Social Sciences (SPSS) version 21.0 to process data. We will analyse data by descriptive statistics (proportions and measures of central tendency), Relative risk (RR) , absolute risk (AR) , odds ratios (OR) and logistic regression analysis to identify the measures of association will be used effect of systematic educational interventions independent of confounding variables. In all analyzes will be considered the significance level of 5 % .