File(s) under permanent embargo

Targeting dietary restraint to reduce binge eating: A randomised controlled trial of a blended internet- And smartphone app-based intervention

journal contribution
posted on 01.01.2021, 00:00 authored by Jake LinardonJake Linardon, Mariel MesserMariel Messer, A Shatte, David SkvarcDavid Skvarc, J Rosato, A Rathgen, Matthew Fuller-TyszkiewiczMatthew Fuller-Tyszkiewicz
Abstract
t
t Background
t Existing internet-based prevention and treatment programmes for binge eating are composed of multiple distinct modules that are designed to target a broad range of risk or maintaining factors. Such multi-modular programmes (1) may be unnecessarily long for those who do not require a full course of intervention and (2) make it difficult to distinguish those techniques that are effective from those that are redundant. Since dietary restraint is a well-replicated risk and maintaining factor for binge eating, we developed an internet- and app-based intervention composed solely of cognitive-behavioural techniques designed to modify dietary restraint as a mechanism to target binge eating. We tested the efficacy of this combined selective and indicated prevention programme in 403 participants, most of whom were highly symptomatic (90% reported binge eating once per week).
t
t
t Method
t Participants were randomly assigned to the internet intervention (n = 201) or an informational control group (n = 202). The primary outcome was objective binge-eating frequency. Secondary outcomes were indices of dietary restraint, shape, weight, and eating concerns, subjective binge eating, disinhibition, and psychological distress. Analyses were intention-to-treat.
t
t
t Results
t Intervention participants reported greater reductions in objective binge-eating episodes compared to the control group at post-test (small effect size). Significant effects were also observed on each of the secondary outcomes (small to large effect sizes). Improvements were sustained at 8 week follow-up.
t
t
t Conclusions
t Highly focused digital interventions that target one central risk/maintaining factor may be sufficient to induce meaningful change in core eating disorder symptoms.
t

History

Journal

Psychological Medicine

Pagination

1 - 11

Publisher

Cambridge University Press

Location

Cambridge, Eng.

ISSN

0033-2917

eISSN

1469-8978

Language

eng

Publication classification

C1 Refereed article in a scholarly journal