Statistical analysis
Analysis of data was performed by IBM computer using SPSS (statistical program for social science version 23): description of quantitative variables as median and range (IQR), Shapiro test of normality used to check the data distribution, description of qualitative variables as number and percentage, Chi-square test was used to compare qualitative variables between groups, Fisher exact test was used when one expected cell or more are less than 5, Mann–Whitney test was used. I considered the results statistically significant when the probability was less than 0.05 (