Statistical Analysis
The collected data were processed and coded before being analyzed using the IBM SPSS program (Statistical Package for Social Sciences) for Windows Version 20.0. Qualitative data are presented using frequencies and related percentages. Quantitative data are presented using means and standard deviations. An independent samples t-test was used to compare the difference in parametric variables between two independent means of two groups. ANOVA was performed to compare quantitative variables among three categories. The chi-squared or Fisher’s exact test was performed for qualitative variable analysis. The statistical methods were verified, assuming a significance level of p <0.05.