Data analysis
The collected data were fed into SPSS version 18. Numerical variables were reported as mean and standard deviation, and categorical variables were presented as frequency and percentage. ANCOVA assessed the mean difference between the intervention and control groups in the primary outcome with repeated measures; the post‐hoc Bonferroni test controlled the increased risk of type I error due to multiple comparisons and compared the pairs with repeated‐measures tests with significant results. An independent 