Validation of the Arabic version of the ORTO-R among a sample of Lebanese young adults.

BACKGROUND: Within the literature, there is a variety of different measurement methods for orthorexic behaviours. The ORTO-15 is the one that attracted most research attention. Many scholars criticized the ORTO-15 for its unstable factor structure and over-estimation of the prevalence of orthorexia nervosa. For this purpose, Rogoza and Donini (Eat Weight Disord 26:887-895, 2020) re-assessed the original data and created a new tool, ORTO-R. The development of the ORTO-R theoretically solved many ambiguities associated with its parent measure. However, to date, no study, including the original one, tested the validity of the ORTO-R, leaving its utility somewhat speculative. METHODS: We gathered data from 363 Lebanese individuals, who answered the ORTO-R questions and a set of measures used to determine the validity of the scale (eating attitudes, perfectionism, body dissatisfaction, self-esteem, anxiety, and depression). Within this study, we analysed the internal consistency of the scale and different aspects of its validity (factorial, convergent, and divergent). RESULTS: Results supported all expectations; we successfully confirmed a one-factor measurement model of the ORTO-R, which appeared to be internally consistent. The ORTO-R score correlated positively to other orthorexic behaviours as well as to disordered eating attitudes, perfectionism, anxiety, and depression. It was also negatively related to self-esteem, but was unrelated to body dissatisfaction. CONCLUSION: The ORTO-R may be deemed as a valid instrument for the assessment of orthorexic behaviours. LEVEL OF EVIDENCE: V: Opinions of authorities, based on descriptive studies, narrative reviews, clinical experience, or reports of expert committees.

Orthorexia nervosa and its association with narcissism in fitness center users.

PURPOSE: Orthorexia nervosa (ON) is an eating behavior where patients obsessively try to reach health through "purity" of food. Narcissism is a personality trait characterized with the self-belief of grandiosity, importance and need of appreciation. Both of these conditions are connected through self-image in way of reaching perfection through health and body image, whereas one of the ways for reaching it is exercising. This cross-sectional study aimed to investigate ON and its possible association with narcissism in fitness center users. METHODS: The study included 1017 fitness center users and three questionnaires were used for the assessment: general information, ORTO-R and Narcissistic personality inventory-13 (NPI-13). RESULTS: There was a significant negative correlation (r = - 0.467, p < 0.001) between the ORTO-R score and the NPI-13 score. Comparison of the ORTO-R score between different durations of using a fitness center showed statistically significant differences (H = 134.72, p < 0.001). The subjects who are using the fitness center for less than 1 year have the highest ORTO-R score, while those who are using it 1-3 years have the lowest ORTO-R score. Moreover, multiple linear regression showed that ORTO-R score retained significant association with NPI-13 (ß ± SE, - 0.416 ± 0.026, p < 0.001) and the duration of using a fitness center (0.576 ± 0.068, p < 0.001) after model adjustment for age and BMI. CONCLUSION: These results are implying that fitness center users could possibly be vulnerable of developing ON and that there is a strong association between ON and narcissism in this population. However, future larger-scale longitudinal studies are needed to address these findings. LEVEL OF EVIDENCE: Level V, cross-sectional survey-based study.

Orthorexia and autism spectrum in University workers: relationship with gender, body mass index and dietary habits.

OBJECTIVE: To date, few studies have investigated the relationship between autistic traits and emerging phenotypes of restrictive disorders, such as Orthorexia nervosa (ON). The aim of the present work was to investigate the relationship between ON symptoms and autistic traits in a population of University employees, focusing on the impact of gender, weight and type of diet. METHODS: All academic and technical/administrative workers of University of Pisa were invited by mail to fulfil through an anonymous online form the Adult Autism Sub-threshold Spectrum (AdAS Spectrum) and the ORTO-R. RESULTS: A total of 285 subjects filled out the questionnaires. Participants with significant autistic traits were included into the Broad autism phenotype (BAP) group, while others into the No BAP group. Subjects in the BAP group reported significantly higher ORTO-R scores than others, while no difference was reported for gender, work position, type of diet, age and BMI. Females showed significantly higher ORTO-R scores and lower BMI than males. Older subjects showed a higher BMI. No significant differences in ORTO-R scores were reported depending on type of diet and work position. A decision tree model, with ORTO-R score as dependent variable, revealed in the first step significantly higher ORTO-R scores in the BAP group than in the No BAP group, and in the second step significantly higher ORTO-R scores among females only in the No BAP group. CONCLUSION: Our results further confirm the association between ON and autism spectrum, which seems to overcome the impact of gender in this population. LEVEL OF EVIDENCE: Level V, descriptive study.

Translation and validation of the Chinese version of the orthorexia nervosa assessment questionnaires among college students.

PURPOSE: The main objective of the study was to translate, validate, and compare the Chinese ORTO scales (ORTO-15 and ORTO-R). The secondary objective was to assess factors that may be related with risk of orthorexia nervosa (ON). METHODS: Two cross-sectional surveys were conducted on March-to-June 2021 for ORTO-15 and April 2022 for ORTO-R. ORTO questionnaires were translated into Chinese using the forward-backward-forward method. Exploratory factor analysis (EFA), discriminant validity and confirmatory factor analysis (CFA) were used to examine the construct validity of the questionnaires. The internal consistency was assessed using the Cronbach alpha coefficient and the test-retest reliability. Multivariate linear regression analysis was used to explore potential factors related with ON scores. RESULTS: Totally, 1289 and 1084 eligible participants were included for assessment of ORTO-15 and ORTO-R, with the mean age of 20.9 ± 2.0 years and 21.0 ± 2.3 years. The internal consistency of Chinese ORTO-15 scale and ORTO-R scale were both satisfactory (α = 0.79, ICC = 0.79; α = 0.77, ICC = 0.82). However, all ORTO-15 models showed a poor fit using CFA whereas the ORTO-R was characterized by acceptable goodness-of-fit. Multivariate linear regression indicated that physical activities and mental disorders were positively associated with ON risk assessed by both ORTO-R and ORTO-15. CONCLUSION: The Chinese ORTO-R scale was a more reliable tool to screen for ON tendencies than the Chinese version of ORTO-15. Mental disorders and physical activities might be associated with the increased ON risk. LEVEL OF EVIDENCE: Level V (descriptive cross-sectional study).

Introducing ORTO-R: a revision of ORTO-15 : Based on the re-assessment of original data.

BACKGROUND: Orthorexia nervosa has attracted significant attention in the field, however, alongside increasing knowledge, more and more gaps are being identified. One of the fundamental problems concerns measurement of orthorexia nervosa. The most commonly used self-report measure, the ORTO-15, demonstrated an unstable factorial structure across different populations. Therefore, one might question whether the knowledge obtained from past research using ORTO-15 is valid or not. The aim of the present paper is to re-analyse original data used for the validation of ORTO-15 to assess its factorial structure and propose its revision, the ORTO-R. METHODS: The description of the sample and procedure corresponds to the one reported in Donini et al. (Eat Weight Disord 10:28-32, 2005). N = 525 subjects were enrolled. To evaluate whether the factorial structure of ORTO-15, we used confirmatory factor analysis. The results revealed that the ORTO-15 indeed does not capture the structure of orthorexia nervosa adequately and revision is needed. The ORTO-R contains six items from ORTO-15, which were identified as the best markers of orthorexia nervosa. DISCUSSION AND CONCLUSION: In the current paper, we present a refined measure of orthorexia nervosa-the ORTO-R. It is based on a frequently used ORTO-15, overcoming its main limitations. We strongly believe that the current work will act as a bridge, linking past with the future research, and that alongside a new measure, the field of research on orthorexia nervosa will move forward. LEVEL OF EVIDENCE: Level V, descriptive study.

Is orthorexia nervosa a feature of obsessive-compulsive disorder? A multicentric, controlled study.

PURPOSE: The term orthorexia nervosa (ON) was coined to describe altered thoughts and behaviours related to healthy eating. The prevalence of ON was found to scale up to almost 90% among high-risk populations (ballet dancers, athletes, and health workers). ON seem to share psychopathological aspects with both Eating Disorders (ED) and Obsessive-Compulsive Disorder (OCD). The aim of the study was to analyse the frequency and intensity of ON symptoms among subjects diagnosed with OCD, hypothesising that they would be higher than in two control groups (subjects with anxiety-depressive disorders and general population). METHODS: We conducted a multi-centre, observational, controlled study. Subjects filled in a socio-demographic questionnaire including questions related to life-style and two psychometric instruments: ORTO-15, for ON symptoms, and OCI-R, for OCD symptoms. Post hoc analysis of the dataset was performed using the revised version of ORTO-15, the ORTO-R. RESULTS: In the final sample of 328 subjects, the overall prevalence of ORTO-15-ON was 59.5%, mean score 37.9 ± 4.2. The mean score at the ORTO-R was 16.6 ± 4.6. No statistically significant differences were found in the prevalence of ON or in the mean ORTO-15 score among OCD patients and the two control groups, and this was confirmed by the multiple regression analysis. At the ORTO-R re-scoring, OCD patients scored significantly lower than the two clinical subgroups (p = .0005) and a lower ORTO-R score was associated to positivity at the OCI-R, confirming the initial hypothesis of the study. CONCLUSIONS: ON symptoms do seem to be more prevalent among subjects suffering from OCD. The psychometric properties of tools available to calculate ON symptoms, namely ORTO-15 vs. ORTO-R, play a relevant role in explaining such finding. ORTO-R seems to be a valid alternative able to overcome such difficulties, though further studies are needed to confirm this.

Psychometric properties of the ORTO-R in a community-based sample of women and men from Poland.

PURPOSE: Over the past two decades, orthorexia nervosa (ON) has been increasingly investigated. Recently, a new revision version of the ORTO-15, namely ORTO-R, was used. The main objective of the present study was to confirm the factor structure of Polish version of the ORTO-R for evaluating ON thoughts and behaviors. METHOD: In three studies, a total of 3081 participants was selected by random sampling through several universities and companies. In Study 1, we used original items of ORTO-15, in Study 2 we used both, the ORTO-15 items and the revised items from ORTO-R, and in Study 3 we used only the items from the ORTO-R. Confirmatory factor analysis was used for determining the factorial structure of the Polish version of the ORTO-R. We also assessed internal consistency and convergent and criterion validity of the ORTO-R. RESULTS: The model composed of the revised items (ORTO-R) was characterized of good convergent and criterion validity. Furthermore, ORTO-R appeared to be more internally consistent as compared to ORTO-15. CONCLUSION: The 6-item ORTO-R is valid and reliable method to assess orthorexic thoughts and behaviors among Polish-speaking population and could be applied in future research. Using revised version of the items is strongly preferred to using the items in their original ORTO-15 form.