2.8. Statistical analysis
SE
The continuous variables were described as mean ± standard deviation (SD)/mean ± standard error (SE) or median (inter quartile range), and the categorical variables were expressed by ratios or constituent ratios. For baseline characteristics, continuous variables were examined by independent sample The James' (All enrolled cases were analyzed by Intention-To-Treat (ITT) analysis, and the missing values were imputed using multiple imputation approach. We first used SPSS software to replace missing data with multiple (All tests in this study were two-tailed and the significance level was set to 