Participation
Participation was calculated as both the percentage and mean number of weeks out of the 24 total weeks in which participants attended virtual workshops, percentage and mean number of weeks in which they attended weekly wellness check-ins, percentage and mean number of weeks in which they engaged in the private group (ie, posts, comments and replies, and reactions), and percentage and mean number of days in which participants tracked food, physical activity, and weight in the WW app. If a participant tracked at least 1 food in a day, they were given credit for a day of tracking. Given that we offered participants myriad ways to engage, the mean number of weeks in which the participant carried out ≥1 of each of these forms of participation was also calculated.