Nutrition and Health Postgraduate, School of Nursing, University Federal of Minas Gerais, Belo Horizonte, MG, Brazil.
Coordination of Food and Nutrition, Ministry of Health, Brasília, DF, Brazil.
Eat Weight Disord. 2021 Dec;26(8):2713-2725. doi: 10.1007/s40519-021-01143-2. Epub 2021 Feb 22.
Orthorexia nervosa has been receiving considerable attention and several tools have been developed to assess it, for instance, the "Düsseldorf Orthorexie Scale" (DOS). Such scale is a validated test to measure orthorexic eating behavior and it has shown good psychometric properties. Therefore, this study aimed to transculturally adapt and validate the Brazilian version of the DOS (DOS-BR).
DOS-BR was obtained using the back-translation process after two reviews done by a focus group and after running a pilot-test (n = 64). A self-report questionnaire was administered to a sample of Brazilian dietitians and Nutrition college students (n = 486). To examine the factor structure of the DOS-BR, exploratory factor analysis and confirmatory factor analysis were conducted. The ordinal alpha was examined. Test-retest reliability was evaluated in a sub-sample (n = 159). Convergent validity was assessed by conducting correlation analyses between the DOS-BR and other theoretically related tools (EAT-26 and OCI-R) within the sub-sample.
A three-factor structure was revealed for the DOS-BR properly fitted (KMO = 0.787). The test showed good internal consistency with an ordinal alpha of 0.795, and it also had excellent test-retest reliability of 0.776. DOS-BR median score was 17 (14-22) in Measurement 1 and 19 (17-22) in Measurement 2. The total score had a positive and moderate correlation with eating disorders symptoms (0.488) and a positive and weak correlation with obsessive-compulsive symptoms (0.224).
The DOS-BR was culturally and psychometrically adequate for the samples of Brazilian Nutrition-related subjects. The tool is indicated as a reliable alternative to evaluate orthorexia nervosa in Brazilian scenery.
Descriptive (cross-sectional) study, Level V.
神经强迫症已受到广泛关注，并且已经开发了几种工具来评估它，例如“杜塞尔多夫神经强迫症量表”（DOS）。该量表是一种经过验证的测试，可以衡量神经强迫症的饮食行为，并且具有良好的心理测量特性。因此，本研究旨在对巴西版 DOS（DOS-BR）进行跨文化适应性和验证。
DOS-BR 通过由焦点小组进行的两次审查和进行试点测试（n=64）之后的回译过程获得。向巴西营养师和营养专业大学生样本（n=486）发放了一份自我报告问卷。为了检验 DOS-BR 的因子结构，进行了探索性因子分析和验证性因子分析。检验了有序 alpha 值。在子样本（n=159）中评估了重测信度。在子样本中，通过进行 DOS-BR 与其他理论相关工具（EAT-26 和 OCI-R）之间的相关分析，评估了收敛效度。
DOS-BR 呈现出适当拟合的三因子结构（KMO=0.787）。该测试具有良好的内部一致性，有序 alpha 值为 0.795，重测信度也非常出色，为 0.776。DOS-BR 的中位数得分为 17（14-22）在测量 1 和 19（17-22）在测量 2。总分与饮食失调症状呈正相关（0.488），与强迫症状呈正相关（0.224）。
DOS-BR 对巴西营养相关主题的样本具有文化和心理测量上的充分性。该工具可作为评估巴西神经强迫症的可靠替代方法。
描述性（横断面）研究，等级 V。
