Study Design
RECRUITMENT
This study adopted a 2-group pretest and repeated posttest randomized controlled trial (RCT) design. This study was conducted from February 2020 to July 2022. Shortly after the study began, the COVID-19 pandemic broke out in Singapore, leading to the implementation of various safety restrictions. Before recruitment, a statistician involved in the study developed a randomization list using a permuted block randomization method with the Research Randomizer [