ORTO 15项、11项和9项量表的验证性因素分析及建议的临界值分数推荐
Confirmatory factor analyses of the ORTO 15-, 11- and 9-item scales and recommendations for suggested cut-off scores.
作者信息
Moller Stephan, Apputhurai Pragalathan, Knowles Simon R
机构信息
Faculty of Health Arts, and Design, Swinburne University of Technology, Melbourne, Australia.
Department of Gastroenterology, Royal Melbourne Hospital, Melbourne, Australia.
出版信息
Eat Weight Disord. 2019 Feb;24(1):21-28. doi: 10.1007/s40519-018-0515-0. Epub 2018 May 23.
AIMS
To explore the validity and recommend cut-off scores in an English-speaking sample for 9, 11, and 15-item versions of the ORTO measure for orthorexia, a proposed eating disorder characterised by a pathological obsession with consuming only 'healthy' foods.
MATERIALS AND METHODS
The sample comprised of 585 participants (82.4% female) who completed an online questionnaire containing the ORTO-15, Eating Attitudes test, Obsessive Compulsive Inventory Revised. A series of Confirmatory Factor Analyses were conducted to test model fit. Binary logistic linear regression and receiver-operating-characteristics (ROC) analyses were used to obtain cut-offs.
RESULTS AND CONCLUSION
Results showed that none of the three published versions (9, 11, and 15-item) of the ORTO produced an acceptable model. Subsequent exploratory and confirmatory factor analyses yielded a seven-item version of the ORTO (ORTO-7) with a strong and stable factor structure. Analysis of cut-offs revealed that a cut-off score of equal or greater than 19 on the ORTO-7 represents probable orthorexia.
LEVEL OF EVIDENCE
Level V, descriptive study.
目的
在一个说英语的样本中，探究用于测量“健康饮食强迫症”（一种以病态地痴迷于只食用“健康”食物为特征的拟议饮食失调症）的ORTO量表9项、11项和15项版本的有效性，并推荐临界分数。
材料与方法
样本包括585名参与者（82.4%为女性），他们完成了一份包含ORTO - 15、饮食态度测试、修订版强迫观念及强迫行为量表的在线问卷。进行了一系列验证性因素分析以检验模型拟合度。使用二元逻辑线性回归和受试者工作特征（ROC）分析来获取临界值。
结果与结论
结果表明，已发表的ORTO的三个版本（9项、11项和15项）均未产生可接受的模型。随后的探索性和验证性因素分析得出了一个具有强大且稳定因素结构的7项版本的ORTO（ORTO - 7）。临界值分析表明，ORTO - 7上等于或大于19的临界分数代表可能患有健康饮食强迫症。
证据水平
V级，描述性研究。
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