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Relationship between disgust and orthorexia nervosa and psychometric properties of the Italian Dusseldorf orthorexia scale in a general population sample
BACKGROUND: It remains unclear among clinicians and researchers whether orthorexia nervosa (ON) is a part of the obsessive–compulsive disorder spectrum or eating disorders. Disgust seems to be a shared psychopathological factor in these clinical presentations, indicating a potentially crucial role i...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10546774/ https://www.ncbi.nlm.nih.gov/pubmed/37789371 http://dx.doi.org/10.1186/s40337-023-00899-5 |
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author | Aloi, Matteo Moniaci, Martina Rania, Marianna Carbone, Elvira Anna Martino, Gabriella Segura-Garcia, Cristina Liuzza, Marco Tullio |
author_facet | Aloi, Matteo Moniaci, Martina Rania, Marianna Carbone, Elvira Anna Martino, Gabriella Segura-Garcia, Cristina Liuzza, Marco Tullio |
author_sort | Aloi, Matteo |
collection | PubMed |
description | BACKGROUND: It remains unclear among clinicians and researchers whether orthorexia nervosa (ON) is a part of the obsessive–compulsive disorder spectrum or eating disorders. Disgust seems to be a shared psychopathological factor in these clinical presentations, indicating a potentially crucial role in ON. On the other hand, numerous psychometric tools have been developed to evaluate ON. The Dusseldorf Orthorexia Scale (DOS) was recently validated in an Italian sample. However, the study's primary limitation was that the scale was only administered to undergraduate university students. This study aimed to investigate the psychometric properties (including factorial structure, reliability, and measurement invariance conditional on sex) of the Italian version of the DOS (I-DOS) on a sample from the general population. Additionally, the study sought to determine the nomological validity of the I-DOS by examining its relationship with disgust sensitivity. METHODS: A sample of 521 participants took part in this study and completed a battery that assessed ON and disgust sensitivity. To assess the I-DOS structure, reliability, and measurement invariance we respectively conducted confirmatory factor analysis (CFA), computed McDonalds’s omega, and performed hierarchical series of multigroup CFAs. Then, we tested the relationship between ON and disgust sensitivity. RESULTS: CFA confirmed the unifactorial model of I-DOS and it respected the configural, metric, and strict invariance while a partial scalar invariance was achieved. It also showed good reliability with an omega of 0.87. In addition, we found a positive relationship between ON and disgust sensitivity, thus confirming the nomological validity of I-DOS. CONCLUSIONS: Our findings suggest that the Italian version of the Dusseldorf orthorexia scale (I-DOS) exhibits strong psychometric properties and can be an effective instrument for assessing ON in a general population sample. Notably, the most significant and innovative outcome was the positive correlation between ON and disgust sensitivity. As disgust has been linked to other clinical presentations, this preliminary result could serve as a foundation for future research exploring this phenomenon in greater detail. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s40337-023-00899-5. |
format | Online Article Text |
id | pubmed-10546774 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-105467742023-10-04 Relationship between disgust and orthorexia nervosa and psychometric properties of the Italian Dusseldorf orthorexia scale in a general population sample Aloi, Matteo Moniaci, Martina Rania, Marianna Carbone, Elvira Anna Martino, Gabriella Segura-Garcia, Cristina Liuzza, Marco Tullio J Eat Disord Research BACKGROUND: It remains unclear among clinicians and researchers whether orthorexia nervosa (ON) is a part of the obsessive–compulsive disorder spectrum or eating disorders. Disgust seems to be a shared psychopathological factor in these clinical presentations, indicating a potentially crucial role in ON. On the other hand, numerous psychometric tools have been developed to evaluate ON. The Dusseldorf Orthorexia Scale (DOS) was recently validated in an Italian sample. However, the study's primary limitation was that the scale was only administered to undergraduate university students. This study aimed to investigate the psychometric properties (including factorial structure, reliability, and measurement invariance conditional on sex) of the Italian version of the DOS (I-DOS) on a sample from the general population. Additionally, the study sought to determine the nomological validity of the I-DOS by examining its relationship with disgust sensitivity. METHODS: A sample of 521 participants took part in this study and completed a battery that assessed ON and disgust sensitivity. To assess the I-DOS structure, reliability, and measurement invariance we respectively conducted confirmatory factor analysis (CFA), computed McDonalds’s omega, and performed hierarchical series of multigroup CFAs. Then, we tested the relationship between ON and disgust sensitivity. RESULTS: CFA confirmed the unifactorial model of I-DOS and it respected the configural, metric, and strict invariance while a partial scalar invariance was achieved. It also showed good reliability with an omega of 0.87. In addition, we found a positive relationship between ON and disgust sensitivity, thus confirming the nomological validity of I-DOS. CONCLUSIONS: Our findings suggest that the Italian version of the Dusseldorf orthorexia scale (I-DOS) exhibits strong psychometric properties and can be an effective instrument for assessing ON in a general population sample. Notably, the most significant and innovative outcome was the positive correlation between ON and disgust sensitivity. As disgust has been linked to other clinical presentations, this preliminary result could serve as a foundation for future research exploring this phenomenon in greater detail. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s40337-023-00899-5. BioMed Central 2023-10-03 /pmc/articles/PMC10546774/ /pubmed/37789371 http://dx.doi.org/10.1186/s40337-023-00899-5 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data. |
spellingShingle | Research Aloi, Matteo Moniaci, Martina Rania, Marianna Carbone, Elvira Anna Martino, Gabriella Segura-Garcia, Cristina Liuzza, Marco Tullio Relationship between disgust and orthorexia nervosa and psychometric properties of the Italian Dusseldorf orthorexia scale in a general population sample |
title | Relationship between disgust and orthorexia nervosa and psychometric properties of the Italian Dusseldorf orthorexia scale in a general population sample |
title_full | Relationship between disgust and orthorexia nervosa and psychometric properties of the Italian Dusseldorf orthorexia scale in a general population sample |
title_fullStr | Relationship between disgust and orthorexia nervosa and psychometric properties of the Italian Dusseldorf orthorexia scale in a general population sample |
title_full_unstemmed | Relationship between disgust and orthorexia nervosa and psychometric properties of the Italian Dusseldorf orthorexia scale in a general population sample |
title_short | Relationship between disgust and orthorexia nervosa and psychometric properties of the Italian Dusseldorf orthorexia scale in a general population sample |
title_sort | relationship between disgust and orthorexia nervosa and psychometric properties of the italian dusseldorf orthorexia scale in a general population sample |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10546774/ https://www.ncbi.nlm.nih.gov/pubmed/37789371 http://dx.doi.org/10.1186/s40337-023-00899-5 |
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