Department of Psychology, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada.
Int J Eat Disord. 2018 Nov;51(11):1244-1251. doi: 10.1002/eat.22956. Epub 2018 Sep 28.
Research suggests that overvaluation of weight and shape is a clinical feature in binge-eating disorder (BED). However, this construct has been differentially defined in the literature even when using the same measure. Here we compare two cut-offs that have previously been used to differentiate clinical and subthreshold overvaluation using the EDE-Q.
Individuals with BED (n = 72, 93% female) and no history of an eating disorder (NED; n = 21, 91% female) completed measures of eating disorder (ED) and general psychopathology online. Individuals with BED were categorized as having clinical or subthreshold overvaluation using two different cut-offs used in previous studies. The clinical, subthreshold, and NED groups were compared on ED and general psychopathology. The association between overvaluation and psychopathology was also assessed in the BED and NED groups.
The two cut-offs yielded identical results, with individuals in the clinical overvaluation group reporting greater ED psychopathology than those in the subthreshold and NED groups. When considered as a continuous variable, overvaluation was a significant predictor of both ED-related and general psychopathology.
The two cut-offs yielded identical results, likely due to the high internal consistency between overvaluation items. Under such circumstances, the use of either cut-off seems appropriate. However, given the associations reported in the regression analyses, we propose that considering overvaluation as a dimensional variable, rather than a categorical one, may have greater utility.
研究表明，对体重和体型的过度重视是暴食症（BED）的一个临床特征。然而，即使使用相同的测量方法，这个概念在文献中也有不同的定义。在这里，我们使用 EDE-Q 比较了之前用于区分临床和亚临床过度重视的两个切点。
患有 BED（n=72，93%为女性）和无饮食障碍史（NED；n=21，91%为女性）的个体在线完成饮食障碍（ED）和一般精神病理学的测量。使用之前研究中使用的两种不同切点，将 BED 个体分为临床或亚临床过度重视。比较 BED、亚临床和 NED 组在 ED 和一般精神病理学方面的差异。还在 BED 和 NED 组中评估了过度重视与精神病理学之间的关系。
两个切点产生了相同的结果，临床过度重视组的个体报告的 ED 心理病理学比亚临床和 NED 组的个体更严重。当作为连续变量考虑时，过度重视是 ED 相关和一般精神病理学的显著预测因子。
两个切点产生了相同的结果，可能是由于过度重视项目之间的内部一致性较高。在这种情况下，使用任何一个切点似乎都是合适的。然而，鉴于回归分析中报告的关联，我们提出，将过度重视视为一个维度变量，而不是一个分类变量，可能更具实用性。
