<qa>  What was the SPSS version 20.0 for Windows?All analyses were performed using SPSS version 20.0 for Windows SPSS Inc., Chicago, IL, USA. Descriptive statistics were used to describe baseline information including frequency count, percentage and mean standard deviation. Further analyses included the chi-square test, independent t-test and Mann-Whitney. P-values under 0.05 were regarded statistically significant. 