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).

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.

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.

Highly focused digital interventions that target one central risk/maintaining factor may be sufficient to induce meaningful change in core eating disorder symptoms.

现有的基于互联网的暴食预防和治疗计划由多个不同的模块组成，这些模块旨在针对广泛的风险或维持因素。这种多模块程序 (1) 对于那些不需要全程干预的人来说可能不必要地长，并且 (2) 很难区分那些有效的技术和那些多余的技术。由于饮食限制是暴饮暴食的一个很好复制的风险和维持因素，我们开发了一种基于互联网和应用程序的干预措施，仅由认知行为技术组成，旨在修改饮食限制作为针对暴饮暴食的机制。我们在 403 名参与者中测试了这种联合选择性和指示性预防计划的功效，

参与者被随机分配到互联网干预组 ( n = 201) 或信息对照组 ( n = 202)。主要结果是客观的暴食频率。次要结果是饮食限制、体型、体重和饮食问题、主观暴饮暴食、去抑制和心理困扰等指标。分析是意向性治疗。

干预参与者报告说，与测试后的对照组相比，客观暴食事件的减少幅度更大（效应量小）。还观察到对每个次要结果（从小到大的影响大小）的显着影响。在 8 周的随访中持续改善。

针对一个主要风险/维持因素的高度集中的数字干预可能足以引起核心饮食失调症状的有意义的变化。