Journal
BEHAVIOUR RESEARCH AND THERAPY
Volume 63, Issue -, Pages 114-121Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.brat.2014.09.008
Keywords
Mediators; Moderators; Subthreshold eating disorders; Internet-based prevention; Randomized controlled trial
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Funding
- NIMH NIH HHS [R01 MH081124, R01 MH081125, R01 MH060453] Funding Source: Medline
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The objective of this study was to investigate moderators and mediators of the effect of an indicated prevention program for eating disorders (ED) on reduction of dysfunctional attitudes and specific ED symptoms. 126 women (M age = 22.3; range 18-33) reporting subthreshold ED symptoms were randomized to the Student Bodies(TM)+ (SB+) intervention or an assessment-only control condition. Assessments took place at pre-intervention, mid-intervention (mediators), post-intervention, and 6-month follow-up. Mixed effects modeling including all available data from all time points were used for the data analysis. Intervention effects on the reduction of binge rate were weaker for participants with higher baseline BMI and for participants with a lower baseline purge rate. Intervention effects on reduction of eating disorder pathology were weaker for participants with higher baseline purge rate and with initial restrictive eating. No moderators of the intervention effect on restrictive eating were identified. An increase in knowledge mediated the beneficial effect of SB+ on binge rate. The results suggest that different moderators should be considered for the reduction of symptoms and change in attitudes of disturbed eating and that SB+ at least partially operates through psychoeducation. (C) 2014 Elsevier Ltd. All rights reserved.
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