SPSS software ver. 15 was used for statistical analysis. 
SPSS
SPSS software ver. 15 was used for statistical analysis. 
SPSS software ver.
Data were analyzed using Chi‑square, Mann-Whitney, Fisher's exact tests, and paired t-test. 
Mann-Whitney
Data were analyzed using Chi‑square, Mann-Whitney, Fisher's exact tests, and paired t-test. 
Fisher's exact tests
Data were analyzed using Chi‑square, Mann-Whitney, Fisher's exact tests, and paired t-test. 
paired t-test
The Kolmogorov-Smirnov test was used to check the normality of data.



Kolmogorov-Smirnov test