[Psychometric validation of the Yale Food Addiction Scale for Children (YFAS-C) in Spanish in a Mexican population].

Introduction: Mexico is one of the countries with the highest prevalence of childhood obesity worldwide. The increase of addictive behaviors at an early age is a possible cause of its development. The Yale Food Addiction Scale for Children (YFAS-C) allows identifying children with food addictive behaviors. Objective: to validate the YFAS-C scale in Spanish in a population sample of Mexican children and adolescents. Material and methods: an exploratory and confirmatory factor analysis was performed. The study sample consisted of 448 children from seven to 14 years of age. The first stage involved translation into Spanish; a second stage involved the solution of questions with discrepancies; then, a reverse translation into the original language and a review by experts on the subject of eating disorders in pediatric population were performed; and in the last stage, a pilot test in order to culturally adapt the instrument and the evaluation of the psychometric properties was carried out. Results: using the principal component extraction method, four components were identified that explained 47.1 % of the sample variance. In the confirmatory factor analysis, it was found that the goodness-of-fit indices met the required values (CFI = 0.906: GFI = 0.932; AGFI = 0.915, SRMS = 0.007 and RMSEA = 0.043). Conclusions: a validated Spanish version of the YFAS-C scale was obtained for Mexican children and adolescents to assess food addiction.