Dell'Osso L, Carpita Barbara, Muti D, Cremone I M, Massimetti G, Diadema E, Gesi C, Carmassi C
Department of Clinical and Experimental Medicine, University of Pisa, Via Roma 67, 56127, Pisa, Italy.
Eat Weight Disord. 2018 Feb;23(1):55-65. doi: 10.1007/s40519-017-0460-3. Epub 2017 Nov 13.
Orthorexia nervosa (ON) has been recently defined as a pathological approach to feeding related to healthiness concerns and purity of food and/or feeding habits. This condition recently showed an increasing prevalence particularly among young adults. In order to investigate the prevalence of ON and its relationship with gender and nutritional style among young adults, we explored a sample of students from the University of Pisa, Italy.
Assessments included the ORTO-15 questionnaire and a socio-demographic and eating habits form. Subjects were dichotomized for eating habits (i.e. standard vs vegetarian/vegan diet), gender, parents' educational level, type of high school attended, BMI (low vs high vs normal BMI). Chi square tests were performed to compare rates of subjects with overthreshold ORTO-15 scores, and Student's unpaired t test to compare mean scores between groups. Two Classification tree analyses with CHAID growing method were employed to identify the variables best predicting ON and ORTO-15 total score.
more than one-third of the sample showed ON symptoms (ORTO-15 ≥ 35), with higher rates among females. Tree analyses showed diet type to predict ON and ORTO-15 total score more than gender.
Our results seem to corroborate recent data highlighting similarities between ON and anorexia nervosa (AN). We propose an interpretation of ON as a phenotype of AN in the broader context of Feeding and eating disorders (FEDs) spectrum.
近年来，正食癖（ON）被定义为一种与对健康、食物纯净度和/或饮食习惯的关注相关的病态进食方式。这种情况最近在年轻人中越来越普遍。为了调查年轻人中正食癖的患病率及其与性别和营养方式的关系，我们对意大利比萨大学的一组学生进行了研究。
评估包括ORTO - 15问卷以及一份社会人口统计学和饮食习惯表格。根据饮食习惯（即标准饮食与素食/纯素饮食）、性别、父母教育水平、就读高中类型、BMI（低BMI、高BMI与正常BMI）对受试者进行分类。进行卡方检验以比较ORTO - 15得分超过阈值的受试者比例，并用学生独立样本t检验比较组间平均得分。采用CHAID生长方法进行两次分类树分析，以确定最能预测正食癖和ORTO - 15总分的变量。
超过三分之一的样本表现出正食癖症状（ORTO - 15≥35），女性比例更高。树分析表明，饮食类型比性别更能预测正食癖和ORTO - 15总分。
我们的结果似乎证实了最近的数据，这些数据突出了正食癖与神经性厌食症（AN）之间的相似性。我们建议在进食和饮食障碍（FEDs）谱系的更广泛背景下，将正食癖解释为神经性厌食症的一种表型。
