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The Dimensional Nature of Eating Pathology: Evidence from a Direct Comparison of Categorical Dimensional and Hybrid Models

机译：饮食病理的维度本质：来自分类维度和混合模型的直接比较的证据

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摘要

Eating disorders are conceptualized as categorical rather than dimensional in the current major diagnostic system (DSM-5) and in many previous studies. However, previous research has not critically evaluated this assumption or tested hybrid models (e.g., modeling latent variables with both dimensional and categorical features). Accordingly, the current study directly compared categorical, dimensional, and hybrid models for eating pathology in a large, population-based sample. Participants included 3,032 female and male twins (ages 9–30 years) from the Michigan State University Twin Registry. The Minnesota Eating Behaviors Survey was used to assess disordered eating symptoms including body dissatisfaction, weight preoccupation, binge eating, and compensatory behaviors. Results showed that dimensional models best fit the data in the overall sample as well as across subgroups divided by sex and pubertal status (e.g., pre-pubertal versus post-pubertal). Interestingly, results favored more categorical models when using a case-control subset of our sample with participants who either endorsed substantial eating pathology or no/little eating pathology. Overall, findings provide support for a dimensional conceptualization of eating pathology and underscore the importance of using community samples to capture the full range of severity of eating pathology when investigating questions about taxonomy.
机译：在当前的主要诊断系统（DSM-5）和许多先前的研究中，饮食失调被概念化为分类而非维度。但是，先前的研究并未严格评估该假设或测试混合模型（例如，同时对具有维度和类别特征的潜变量进行建模）。因此，当前的研究直接比较了以人群为基础的大样本饮食病理的分类，尺寸和混合模型。参加者包括密歇根州立大学双生子登记处的3,032对双胞胎（9至30岁）。明尼苏达州饮食行为调查用于评估饮食失调症状，包括身体不满，体重过分集中，暴饮暴食和代偿行为。结果表明，维度模型最适合整体样本以及各个亚组中的数据，除以性别和青春期状态（例如青春期前与青春期后）。有趣的是，当我们使用样本控制病例的子集，并且参与者支持实质性饮食病理或无/少量饮食病理时，结果倾向于更分类的模型。总体而言，研究结果为饮食病理的维度概念化提供了支持，并强调了在调查有关分类学的问题时，使用社区样本来捕获饮食病理严重程度的全部范围的重要性。

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