2.1 Statistical analyses
The collected data was entered and analyzed through the data collection form in SPSS software version 20. For descriptive analysis, mean and standard deviation will be used for quantitative variables and frequency and frequency percentage will be used for qualitative variables. To evaluate the effect of each variable as a univariate test, independent two-sample t-test, one-way ANOVA and chi-square will be performed for quantitative and qualitative factors, respectively. Also, the study of the effect of variables is multivariate modeled using logistic regression model and significance is considered at the level of 0.05. The Mann–Whitney U test was utilized to compare significant differences among continuous data. All statistical tests were two tailed, and the p value less than 0.05 was considered statistically significant.