To compare the differences in demographic data and outcome measurements among the C, PE and ESMI groups, the chi-square test was used for nominal data, one-way ANOVA was applied for changes in the mean scores of ESE scale, and the Kruskal–Wallis test was employed for changes in other continuous data at each time point. All statistical analyses were completed using SPSS 18.0 (IBM). The significance level was set at 0.05 (two-tailed)