Grilo Carlos M, Reas Deborah L, Hopwood Christopher J, Crosby Ross D
Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut.
Int J Eat Disord. 2015 Apr;48(3):284-9. doi: 10.1002/eat.22358. Epub 2014 Oct 27.
The Eating Disorder Examination-Questionnaire (EDE-Q) is widely used in research studies across clinical and nonclinical groups. Relatively little is known about psychometric properties of this measure and the available literature has not supported the proposed scale structure. This study evaluated the factor structure and construct validity of the EDE-Q in a nonclinical study group of young adults.
Participants were 801 young adults (573 females and 228 males) enrolled at a large public university in the Midwestern United States who completed the EDE-Q and a battery of behavioral and psychological measures.
Confirmatory factor analysis (CFA) revealed an inadequate fit for the original EDE-Q structure but revealed a good fit for an alternative structure suggested by recent research with predominately overweight/obese samples. CFA supported a modified seven-item, three-factor structure; the three factors were interpreted as dietary restraint, shape/weight overvaluation, and body dissatisfaction. Factor loadings and item intercepts were invariant across sex and overweight status. The three factors had less redundancy than the original EDE-Q scales and demonstrated improved convergent and discriminant validity in relation to relevant other measures.
These factor-analytic findings, which replicate findings from studies with diverse predominately overweight/obese samples, supported a modified seven-item, three-factor structure for the EDE-Q with improved psychometric characteristics. The findings provide further empirical support for the distinction between body dissatisfaction and overvaluation and have implications for assessment and research. These findings need to be replicated in samples of persons with eating-disorder psychopathology including those with anorexia nervosa, bulimia nervosa, and allied states.
饮食失调检查问卷（EDE-Q）在临床和非临床群体的研究中被广泛使用。关于该量表的心理测量特性，人们了解相对较少，现有文献也未支持其提议的量表结构。本研究评估了EDE-Q在一个非临床青年成人研究组中的因子结构和结构效度。
参与者为801名青年成人（573名女性和228名男性），他们就读于美国中西部一所大型公立大学，完成了EDE-Q以及一系列行为和心理测量。
验证性因子分析（CFA）显示，原始EDE-Q结构的拟合度不足，但对于近期以超重/肥胖样本为主的研究所提出的替代结构，拟合度良好。CFA支持一种修改后的七项三因子结构；这三个因子被解释为饮食限制、体型/体重过度重视和身体不满。因子载荷和项目截距在性别和超重状态上是不变的。这三个因子的冗余度低于原始EDE-Q量表，并且在与其他相关测量的关系中，收敛效度和区分效度有所提高。
这些因子分析结果重复了以不同的超重/肥胖样本为主的研究结果，支持了EDE-Q的一种修改后的七项三因子结构，其心理测量特性有所改善。这些发现为身体不满和过度重视之间的区别提供了进一步的实证支持，并对评估和研究具有启示意义。这些发现需要在患有饮食失调心理病理学的人群样本中进行重复验证，包括神经性厌食症、神经性贪食症及相关状态的患者。
