Confirmatory factor analysis and psychometric properties of the Yale Brown Cornell Eating Disorders Scale Self-Report version (SR-YBC-EDS) in Spanish clinical and non-clinical samples

Abstract

[EN] Objective: The aimof the study was to adapt and validate the Yale Brown Cornell Eating Disorder Scale (YBC-EDS) transformed into a self-report format in Spanish clinical and non-clinical samples. Method: Eighty-three eating disordered patients and 358 non-clinical participants completed the Self Report-YBCEDS version (SR-YBC-EDS), the Eating Attitudes Test (EAT), and the Penn State Worry Questionnaire (PSWQ). Results: Confirmatory factor analyses of a two-factor second-order model showed adequate values of goodness-of fit indices for non-clinical (normed ÷2=13.4578; df=18; NFI=0.980; GFI=1.00; RMSEA= 0.00) and clinical samples (normed ÷2 = 26.5913; df =18; NFI = 0.944; GFI = 0.981; RMSEA = 0.076). The factor loadings were high (preoccupations range: 0.69 0.91; rituals range: 0.61 0.94). Cronbach's alpha (range á = 0.85 0.90) and test retest 2 weeks later (range: 0.84 0.91) were excellent in both samples. SR-YBC-EDS showed moderate-high indices of convergent validity with PSWQ and EAT. For the total score, a cutoff of 13 showed a sensitivity of 90.4%, a specificity of 91.6%, and a diagnostic accuracy of 91.4%. Positive and negative predictive values were excellent (71.4% and 97.6%, respectively). Discussion: Findings indicate that the SR-YBC-EDS is a reliable and valid instrument to identify symptoms and assess the severity of ED, and it can be used as a faster and less costly alternative to the YBC-EDS interview.