Question special

Given that over 40% of the US population has obesity, weight management needs to be based in the primary care/community setting to reach the most patients possible and ensure long term monitoring and engagement. So kudos for showing that what is achievable in academia and weight centers is also achievable in the primary care setting if resources are available.

My question: the study has an over 80% retention rate which is very good. How were you able to retain subjects especially in the usual care group?