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Measuring Orthorexia Nervosa: Psychometric Limitations of the ORTO-15.
Span J Psychol. 2017 Sep 20; 20:E41.SJ

Abstract

Orthorexia nervosa has recently been defined as excessive preoccupation with healthy eating, causing significant nutritional deficiencies and social and personal impairments. The ORTO-15 is the most widely used instrument to evaluate orthorexia nervosa, although previous studies obtained inconsistent results about its psychometric properties, and there are no data on the Spanish version. Thus, the main objective of the present study was to analyze the psychometric properties of the Spanish adaptation of the ORTO-15. In order to cross-validate the results, two independent samples were used (Sample 1: n = 807, 74.1% women; Sample 2: n = 242, 63.2% women). The results did not support the original recoding and reversal of the items; thus, the original scores were maintained. The analysis of the internal structure showed that the best interpretable solution was unidimensional, and due to low loadings, four items were removed. The internal consistency (α = .74) and temporal stability (r = .92; p < .001) of the final ORTO-11 version were adequate, higher than the 15-item version. The questionnaire showed significant associations with eating psychopathology (EAT-26 and SR-YBC-EDS; range r = .64 - .29; p < .05). However, this result should be interpreted with caution due to the redundancy observed between the ORTO-15 and the EAT-26. Our results suggest that the psychometric properties of the Spanish version of the ORTO-15 are not adequate. Moreover, the instrument detects people who are on diets, but it is not efficient in detecting the severity of orthorexic behaviors and attitudes. New instruments are needed to continue the study of orthorexia nervosa.

Authors+Show Affiliations

Universitat de Valencia(Spain).Universidad de Zaragoza(Spain).Universitat de Valencia(Spain).

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28929989

Citation

Roncero, María, et al. "Measuring Orthorexia Nervosa: Psychometric Limitations of the ORTO-15." The Spanish Journal of Psychology, vol. 20, 2017, pp. E41.
Roncero M, Barrada JR, Perpiñá C. Measuring Orthorexia Nervosa: Psychometric Limitations of the ORTO-15. Span J Psychol. 2017;20:E41.
Roncero, M., Barrada, J. R., & Perpiñá, C. (2017). Measuring Orthorexia Nervosa: Psychometric Limitations of the ORTO-15. The Spanish Journal of Psychology, 20, E41. https://doi.org/10.1017/sjp.2017.36
Roncero M, Barrada JR, Perpiñá C. Measuring Orthorexia Nervosa: Psychometric Limitations of the ORTO-15. Span J Psychol. 2017 Sep 20;20:E41. PubMed PMID: 28929989.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Measuring Orthorexia Nervosa: Psychometric Limitations of the ORTO-15. AU - Roncero,María, AU - Barrada,Juan Ramón, AU - Perpiñá,Conxa, Y1 - 2017/09/20/ PY - 2017/9/21/entrez PY - 2017/9/21/pubmed PY - 2018/6/9/medline KW - eating disorders KW - orthorexia nervosa KW - psychometric properties KW - validation SP - E41 EP - E41 JF - The Spanish journal of psychology JO - Span J Psychol VL - 20 N2 - Orthorexia nervosa has recently been defined as excessive preoccupation with healthy eating, causing significant nutritional deficiencies and social and personal impairments. The ORTO-15 is the most widely used instrument to evaluate orthorexia nervosa, although previous studies obtained inconsistent results about its psychometric properties, and there are no data on the Spanish version. Thus, the main objective of the present study was to analyze the psychometric properties of the Spanish adaptation of the ORTO-15. In order to cross-validate the results, two independent samples were used (Sample 1: n = 807, 74.1% women; Sample 2: n = 242, 63.2% women). The results did not support the original recoding and reversal of the items; thus, the original scores were maintained. The analysis of the internal structure showed that the best interpretable solution was unidimensional, and due to low loadings, four items were removed. The internal consistency (α = .74) and temporal stability (r = .92; p < .001) of the final ORTO-11 version were adequate, higher than the 15-item version. The questionnaire showed significant associations with eating psychopathology (EAT-26 and SR-YBC-EDS; range r = .64 - .29; p < .05). However, this result should be interpreted with caution due to the redundancy observed between the ORTO-15 and the EAT-26. Our results suggest that the psychometric properties of the Spanish version of the ORTO-15 are not adequate. Moreover, the instrument detects people who are on diets, but it is not efficient in detecting the severity of orthorexic behaviors and attitudes. New instruments are needed to continue the study of orthorexia nervosa. SN - 1988-2904 UR - https://www.unboundmedicine.com/medline/citation/28929989/Measuring_Orthorexia_Nervosa:_Psychometric_Limitations_of_the_ORTO_15_ L2 - https://www.cambridge.org/core/product/identifier/S1138741617000361/type/journal_article DB - PRIME DP - Unbound Medicine ER -