Statistical Analysis
Statistical analyses were performed using SAS, version 9.4 (SAS Institute Inc). Outcomes were analyzed by means of an intention-to-treat method and a per-protocol method. The intention-to-treat analysis included participants in both groups at baseline, while the per-protocol analysis included participants in the control group and those in the intervention group who were able to continue the intervention without interruption by the COVID-19 pandemic. A comparison between the 2 groups was performed using the χ