Adaptation and validation of the Spanish version of the ORTO-15 questionnaire for the diagnosis of orthorexia nervosa

PLoS One. 2018 Jan 10;13(1):e0190722. doi: 10.1371/journal.pone.0190722. eCollection 2018.

Abstract

The aim of this study was the validation and analysis of the psychometric properties of a Spanish translation of the ORTO-15 questionnaire; an instrument designed to assess orthorexia nervosa behavior. Four hundred and fifty-four Spanish university students (65% women) aged between 18 and 51 years (M = 21.48 ± 0.31) completed the Spanish version of ORTO-15 and the Eating Disorders Inventory-2 (EDI-2). The Principal Component Analysis suggested a three-factor structure for the abbreviated 11-item version of the instrument. The internal consistency of the measurement was adequate (Cronbach's alpha = 0.80). The proposed test demonstrated a good predictive capacity at a threshold value of <25 (efficiency 84%, sensitivity 75% and specificity 84%). Our results support the psychometric properties of the proposed Spanish shortened-version of the ORTO-15 as being a reliable tool for assessing orthorexia nervosa. Its use is expected to greatly contribute to a better understanding of the impact of this disorder in Spain.

Publication types

  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Adolescent
  • Adult
  • Eating*
  • Health Behavior
  • Humans
  • Middle Aged
  • Obsessive Behavior / diagnosis*
  • Principal Component Analysis
  • Spain
  • Surveys and Questionnaires*
  • Young Adult

Grants and funding

Casero-Alonso received sponsorship by the Ministry of Economy, Competitiveness and Funds FEDER MTM2013-47879-C2-1-P, MTM2016-80539-C2-1-R and Grant GI20174047 from UCLM. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.