Body dissatisfaction has been related to Body Image Disorders (BIDs) such as Eating Disorders (EDs) and Body Dysmorphic Disorder (BDD). This study investigates the efficacy of a mHealth app in reducing body dissatisfaction, BDD/ED symptoms and related features. Ninety-five women who were identified as high-risk of developing BIDs (using the Structured Clinical Interview for DSM-5) were randomized into: immediate-use App (iApp group; n = 47) and delayed-use App (dApp group; n = 48). The iApp group started using the app at baseline for 16 days (T1). The dApp group started using the app at T1 for 16 days. Participants completed questionnaires at baseline (T0), 16 days from baseline (T1), and 32 days from baseline (T2). Repeated measure Multivariate Analysis of Variance (MANOVA) showed Group (iApp vs. dApp) × Time (T0 vs. T1) interactions indicating decrease in BDD symptoms and body dissatisfaction related to EDs in the iApp group at T1. The Reliable Change Index indicated changes on extreme body dissatisfaction/BDD symptoms for 34.74% of participants. Although preliminary, these findings highlight that a mHeatlh app might reduce BDD symptoms and body dissatisfaction related to EDs in women at high-risk for BIDs. Effects on ED symptoms and associated features seem more limited.

身体不满意与身体形象障碍 (BID) 有关，例如饮食失调 (ED) 和身体变形障碍 (BDD)。本研究调查了 mHealth 应用程序在减少身体不满、BDD/ED 症状和相关特征方面的功效。95 名被确定为发生 BID 高风险的女性（使用 DSM-5 的结构化临床访谈）被随机分为：立即使用应用程序（iApp 组；n  = 47）和延迟使用应用程序（dApp 组；n = 48)。iApp 组在基线时开始使用该应用程序 16 天 (T1)。dApp 组在 T1 开始使用该应用程序 16 天。参与者在基线 (T0)、基线后 16 天 (T1) 和基线后 32 天 (T2) 完成问卷调查。重复测量多变量方差分析 (MANOVA) 显示组 (iApp 与 dApp) × 时间 (T0 与 T1) 相互作用表明在 T1 时 iApp 组中 BDD 症状和与 ED 相关的身体不满减少。可靠变化指数表明 34.74% 的参与者极度身体不满意/BDD 症状发生了变化。尽管是初步的，但这些发现强调了 mHeatlh 应用程序可能会减少 BID 高风险女性的 BDD 症状和与 ED 相关的身体不满。对 ED 症状和相关特征的影响似乎更加有限。