Do participant, facilitator, or group factors moderate effectiveness of the Body Project? Implications for dissemination

Meghan L Butryn, Paul Rohde, C Nathan Marti, Eric Stice, Meghan L Butryn, Paul Rohde, C Nathan Marti, Eric Stice

Abstract

The Body Project is a dissonance-based selective eating disorder prevention program with a broad evidence-base. The study sought to determine if previous findings regarding participant moderators replicate in an effectiveness trial under more real-world conditions. This study also had the novel aim of examining facilitator characteristics and group-level variables as potential outcome predictors. These aims are critical for understanding when the intervention is most effective and for whom. Participants were 408 young women with body image concerns recruited from seven universities. Change in eating disorder symptoms at 1-year follow-up was the primary outcome. Intervention effects were significant for both participants who had low or high baseline symptom levels, but the effect size was approximately twice as large for participants with high initial symptom levels (d = 0.58 vs. 0.24). Intervention effects were not predicted by facilitator factors (education, age, BMI, sex) or by group size or attendance rate. This study demonstrates that participants with either low or high eating disorder symptoms will benefit from the intervention but if resources are limited, targeting those with elevated eating disorder symptoms may be sensible. Results also suggest that a wide variety of facilitators can effectively deliver the Body Project, which has encouraging implications for dissemination.

Keywords: Dissemination; Eating disorders; Prevention.

Copyright © 2014 Elsevier Ltd. All rights reserved.

Figures

Figure 1
Figure 1
Fitted values for the condition × time × eating disorder symptoms interaction for control and Body Project participants at pre- and post-intervention at high (1 SD above the mean) and low (1 SD below the mean) baseline eating disorder symptoms (BL ED Sx) with standard error of the difference for post-test comparisons.

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