Statistical analysis
Data entry and data analysis were done using SPSS version 22 (Statistical Package for Social Science). Data were presented as number, percentage, mean, median, and standard deviation. Chi-square test was used to compare qualitative variables. Mann–Whitney test was used to compare quantitative variables between two groups and Kruskal–Wallis test for more than two groups. Spearman correlation was done to measure correlation between quantitative variables. 