Department of Psychology, Sapienza University of Rome, via dei Marsi 78, 00185, Rome, Italy.
Department of Experimental Medicine, Medical Pathophysiology, Food Science and Endocrinology Section, Food Science and Human Nutrition Research Unit, Sapienza University of Rome, Piazzale Aldo Moro, Rome, Italy.
Eat Weight Disord. 2022 May;27(4):1405-1413. doi: 10.1007/s40519-021-01278-2. Epub 2021 Aug 5.
Orthorexia Nervosa (ON) is described as an extreme level of preoccupation around healthy eating, accompanied by restrictive eating behaviors. During the years, different assessment instruments have been developed. The aim of the study is to adapt into Italian the Düsseldorf Orthorexia Scale (I-DOS) and to test its psychometric properties.
A total sample of 422 volunteer university students (mean age = 20.70 ± 3.44, women 71.8%) completed a group of self-report questionnaires in large group sessions during their lecture time. The scales assessed ON (the I-DOS and the Orhto-15), disordered eating (Disordered Eating Questionnaire, DEQ), depressive symptoms (Beck Depression Inventory-II, BDI-II), obsessive and compulsive symptoms (Obsessive Compulsive Inventory-Revised, OCI-R), and self-reported height and weight.
The fit of the unidimensional structure and reliability of the I-DOS was tested trough Confirmatory Factor Analysis (CFA) as well as its criterion validity computing correlation coefficients among Ortho-15, DEQ, BDI-II, OCI-R, BMI. Analyses confirmed the unidimensional structure of the I-DOS with acceptable or great fit indices (CFI = 0.984; TLI = 0.978; SRMR = 0.043; RMSEA = 0.076) and the strong internal consistency (α = 0.888). The correlations path supported the criterion validity of the scale. The estimated total prevalence of both ON and ON risk was 8.1%.
This 10-item scale appears to be a valid and reliable measure to assess orthorexic behaviors and attitudes.
Level V, descriptive cross-sectional study.
饮食强迫症（ON）被描述为一种对健康饮食的极度关注，伴随着限制性行为。多年来，已经开发出不同的评估工具。本研究旨在将杜塞尔多夫饮食强迫症量表（I-DOS）翻译成意大利语，并测试其心理测量学特性。
共有 422 名志愿大学生（平均年龄 20.70 ± 3.44，女性 71.8%）在讲座时间的大组会议中完成了一组自我报告问卷。这些量表评估了 ON（I-DOS 和 Orhto-15）、饮食失调（饮食失调问卷，DEQ）、抑郁症状（贝克抑郁量表第二版，BDI-II）、强迫和强迫症状（修订后的强迫量表，OCI-R），以及自我报告的身高和体重。
通过验证性因素分析（CFA）测试了 I-DOS 的单维结构和可靠性，以及通过计算 Ortho-15、DEQ、BDI-II、OCI-R 和 BMI 之间的相关系数来评估其标准有效性。分析证实了 I-DOS 的单维结构，具有可接受或较高的拟合指数（CFI=0.984；TLI=0.978；SRMR=0.043；RMSEA=0.076）和较强的内部一致性（α=0.888）。路径分析支持该量表的标准有效性。ON 和 ON 风险的总估计患病率为 8.1%。
这个 10 项量表似乎是评估饮食强迫症行为和态度的有效可靠的测量工具。
五级，描述性横断面研究。
