Statistical Analysis
Statistical analyses were conducted using SPSS version 26 and Stata version 14.2. To minimize data errors, quality assurance procedures were implemented, which included training data entry operators and checking data entry quality at regular intervals. Descriptive statistics were conducted regularly to ensure data consistency and integrity. Data privacy was ensured by removing identifiable information of participants and saving the data in password-protected computers and locked cupboards. Only the data management team had access to the study data. Robust methods suitable for cluster trials with relatively few clusters per arm