Statistical analysis
Baseline and post-intervention data were summarized as mean and standard deviation (SD) for normal variables, median and quartile ranges for abnormal variables, and number and percentage for categorical variables. Baseline and 6-month follow-up characteristics of each group were compared using an independent two-sample t test or chi-square test. Paired t test was used to compare the differences before and after the same intervention. The missing values were interpolated with the mean. Double-tailed P value<0.05 was considered statistically significant. SPSS Statistics 25 (IBM) software was used for statistical analysis.