Testing mediators of intervention effects in randomized controlled trials: An evaluation of two eating disorder prevention programs.

Full Abstract

The authors investigated mediators hypothesized to account for the effects of 2 eating disorder prevention programs using data from 355 adolescent girls who were randomized to a dissonance or a healthy weight intervention or an active control condition. The dissonance intervention produced significant reductions in outcomes (body dissatisfaction, dieting, negative affect, bulimic symptoms) and the mediator (thin-ideal internalization), change in the mediator correlated with change in outcomes and usually occurred before change in outcomes, and intervention effects became significantly weaker when change in the mediator was partialed, providing support for the hypothesized mediators and this new approach to testing mediation in randomized trials. Findings provide somewhat less support for the hypothesis that change in healthy eating and exercise would mediate the healthy weight intervention effects.Copyright 2007 APA, all rights reserved.

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Author information

Author/s: Stice, Eric (E); Presnell, Katherine (K); Gau, Jeff (J); Shaw, Heather (H);

Affiliation: Department of Psychology, University of Texas at Austin, Austin, TX, USA. estice(-atsign-)ori.org

Grants: MH/DK6195 (Agency:NIDDK NIH HHS) ; MH64254 (Agency:NIMH NIH HHS) ; MH70699 (Agency:NIMH NIH HHS)

Journal and publication information

Publication Type: Journal Article; Randomized Controlled Trial; Research Support, N.I.H., Extramural

Journal: Journal of consulting and clinical psychology (J Consult Clin Psychol), published in United States. (Language: eng)

Reference: 2007-Feb; vol 75 (issue 1) : pp 20-32

Dates: Created 2007/02/13; Completed 2007/03/13; Revised 2007/12/03;

PMID: 17295560, status: MEDLINE (last retrieval date: 12/26/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adolescent
Affect
Anorexia Nervosa - diagnosis; diet therapy; prevention & control
Body Image
Bulimia Nervosa - diagnosis; diet therapy; prevention & control

Bulimia Nervosa - diagnosis; diet therapy; prevention & control
Female
Health Behavior
Humans
Treatment Outcome

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