Statistical analysis
We used SPSS version 22. Data were presented as mean (SD), number, and percentage. Parametric and nonparametric tests were applied according to the data distribution. In the case of parametric data, an independent samples t-test was used to compare quantitative variables between the two groups. While in the case of nonparametric data, the Mann-Whitney test was used to compare quantitative variables between the two groups, Chi-square and Fisher Exact tests were used to compare qualitative variable. The P-value was considered statistically significant when P < 0.05.