Evaluation of a workplace weight management program based on WeChat platform for obese/overweight people in China using the RE-AIM framework

A Weight Management Program (WMP) is a critical and promising approach to losing excess weight and maintaining a healthy lifestyle for obese/overweight people. This study used the RE-AIM framework to retrospectively evaluate a WeChat-based workplace WMP that include low- and high-intensity interventions - selfmanagement (SM) and intensive support (IS) - designed for employees with varying levels of health risk at a Chinese company. Both interventions incorporated with a variety of m-health technologies and behavioral strategies. While the IS group additionally received personalized feedback on diet record and intensive social support. Approximately 26% of all overweight/obese employees in the company enrolled in the program. Both groups lost a significant amount of weight at the endpoint (P < 0.001). In comparison to the SM group, the IS group had significantly higher level of compliance with self-monitoring. At six-month, 67% of individuals reported no additional weight gain. The WeChat-based WMP has received widespread praise from program participants and intervention providers in spite of difficulties encountered. This comprehensive and meticulous evaluation revealed both the strengths and weaknesses of the program, which will assist in improving implementation and balancing the cost and effectiveness of online WMP.