Readmissions and reason for readmissions during the 24- month’s follow-up period.

Student’s t- test was used for continuous variables, presented as mean ± standard deviation (SD). Categorical variables are given as percent (%) and are compared using Chi-square test.Readmissions and reason for readmissions during the 24- month’s follow-up period.连续变量采用学生t检验进行统计分析，结果以均值±标准差（SD）表示。分类变量以百分比（%）形式呈现，组间比较采用卡方检验。涵盖随访24个月期间的再入院情况及再入院原因。