Educational Science Research Institute, Hunan University, Changsha, 410000, Hunan, China.
School of Humanities and Social Science, Chinese University of Hong Kong (Shenzhen), Shenzhen, Guangdong, China.
Eat Weight Disord. 2019 Jun;24(3):453-463. doi: 10.1007/s40519-019-00656-1. Epub 2019 Feb 22.
As there is no measure available in Chinese for assessing orthorexia nervosa (ON), and as the Düsseldorf Orthorexia Scale (DOS) has demonstrated to be a valid measure for such a purpose, the current study aimed to obtain a Chinese version of the DOS (C-DOS), to evaluate psychometric properties of the C-DOS in a sample of Chinese university students, and to explore the prevalence of ON among the participants.
According to standard procedures, the C-DOS was obtained and administered to 1075 mainland Chinese university students (52.7% female) recruited from two provinces in mainland China. To examine the factor structure of the C-DOS, the total sample was split into two halves, one for exploratory factor analysis, and the other for confirmatory factor analysis. The ordinal alpha and test-retest reliability were examined. Convergent and divergent validity was assessed by conducting Pearson correlation analyses between the C-DOS and other theoretically related/unrelated measures. Prevalence of ON was estimated based on the total score of the C-DOS with the cutoff value of 30.
A three-factor structure was revealed for the C-DOS. The C-DOS showed good internal consistency with an ordinal alpha of 0.80, and it also had good test-retest reliability of 0.77. The total scores of the C-DOS had strong and statistically significant positive correlations with eating inflexibility, while the total scores had weak correlations with other eating disturbances. Strong measurement invariance across gender groups was also supported. The prevalence of ON was 7.8% with males showing higher rates of ON than females (10.6% vs. 5.3%).
The Chinese version of the DOS (C-DOS) was psychometrically adequate for the sample of Chinese students. Given the high prevalence of ON found in the current study, more attention to ON, as well as further research and potential interventions, are warranted in China.
Descriptive (cross-sectional) study, Level V.
由于目前尚无中文评估饮食失调（orthorexia nervosa，ON）的测量工具，而杜塞尔多夫饮食失调量表（Düsseldorf Orthorexia Scale，DOS）已被证明是一种有效的评估工具，因此本研究旨在获得 DOS 的中文版本（C-DOS），评估 C-DOS 在中国大陆大学生样本中的心理测量学特性，并探索参与者中 ON 的患病率。
根据标准程序，我们对来自中国大陆两个省份的 1075 名中国大陆大学生（52.7%为女性）进行了 C-DOS 的获取和管理。为了检验 C-DOS 的因子结构，将总样本分为两半，一半用于探索性因子分析，另一半用于验证性因子分析。检验了 C-DOS 的有序 alpha 和重测信度。通过对 C-DOS 与其他理论上相关/不相关的测量工具进行 Pearson 相关分析，评估了 C-DOS 的聚合和发散效度。根据 C-DOS 的总分和 30 分的截断值来估计 ON 的患病率。
C-DOS 呈现出三因子结构。C-DOS 具有良好的内部一致性，有序 alpha 为 0.80，重测信度为 0.77。C-DOS 的总分与饮食灵活性差呈强且具有统计学意义的正相关，而总分与其他饮食障碍呈弱相关。跨性别组的测量不变性也得到了有力支持。ON 的患病率为 7.8%，男性的 ON 患病率高于女性（10.6% vs. 5.3%）。
DOS 的中文版本（C-DOS）对中国大陆学生样本具有良好的心理测量学特性。鉴于本研究中发现的 ON 高患病率，中国需要更多关注 ON 以及进一步的研究和潜在干预措施。
描述性（横断面）研究，等级 V。
