Dataset from Study of Novel Approaches for Prevention

The Study of Novel Approaches for Prevention (SNAP) is randomized trial designed to test
whether behavioral interventions based on self-regulation can prevent weight gain in young
adults (18-35 years; body mass index (BMI) 21-30 kg/m2). Two different self-regulation
interventions for weight gain prevention will be compared in this trial; one intervention
will focus on making small, consistent, changes in eating and exercise behavior to prevent
weight gain or reverse weight gain if it occurs, whereas the other will emphasize larger
changes in eating and exercise that occur periodically, with a goal of producing weight loss
and thereby providing a buffer against anticipated weight gains. The primary aim of the trial
is to test whether the magnitude of weight gain from baseline across an average three-year
follow-up differs across the three groups, with the hypotheses that weight gain will be
greater in the Control group than in either intervention and greater in the Small Changes
than Large Changes group.

SNAP-E (Extension) will determine whether the effects of the intervention can be maintained
over an additional 3 years (i.e. through a total of 6 years).