Psychometric properties of the Eating Disorders Inventory - 3 (EDI-3) among female adolescents from Argentina11Este trabajo forma parte de un proyecto subsidiado por la Universidad de Buenos Aires (Directora: Guillermina Rutsztein - UBACyT 20020090100053)

Abstract

The aim of this study is to explore the factor structure and internal consistency of the Eating Disorder Inventory-3 (EDI-3) among female adolescents from Buenos Aires (Argentina). 725 high school students, aged 13 to 19 years, completed the EDI-3 and a sociodemographic questionnaire. Different factor solutions were evaluated. The most satisfactory solution was reached to explore, first, the items of the three Eating Disorder Risk Scales (good structure, variance explained = 46.7%) and on the other, items of the Psychological Scales (with partial divergence from theoretical structure, variance explained = 44.1%). The computation of Composites (combining different scales proposed by the author) fitted more closely to the original version. Internal consistency coefficients for most scales were adequate. In analyzing the discriminatory power of the items, it was found a "floor effect" on some scales, this being expected in general population. We conclude that the EDI-3 is a valid instrument for the assessment of risk for eating disorders in general population and, consequently, its early detection. We discuss the use of this instrument in general population. ResumenEl objetivo de este estudio es explorar la estructura factorial y la consistencia interna del Inventario de Trastornos Alimentarios-3 (EDI-3) en adolescentes mujeres de Buenos Aires (Argentina). 725 estudiantes de escuelas secundarias, entre 13 y 19 años, completaron el EDI-3 y un cuestionario sociodemográfico. Se evaluaron diferentes soluciones factoriales. La solución más satisfactoria se alcanzó al explorar, por un lado, los ítems de las tres escalas de riesgo de trastorno alimentario (buena estructura, varianza explicada 46,7%) y por el otro, los ítems de las escalas psicológicas (estructura parcialmente diferente de la teórica, varianza explicada: 44,1%). El cómputo por Índices (agrupación de distintas escalas propuesta por el autor) se adecua más a la versión original. Los coeficientes de consistencia interna fueron adecuados en la mayoría de las escalas. Al analizar la capacidad discriminante de los ítems, se observó un "efecto suelo" en algunas escalas, siendo esto esperable en población general. Se concluye que el EDI-3 resulta un instrumento estructuralmente válido para la evaluación de riesgo de trastorno alimentario en población general y, en consecuencia, su detección temprana. Se discute el uso del instrumento en población general.

Efficacy of an integrated program (PIA‐2) to reduce the risk for problems related to eating, weight and body image in female adolescents from Argentina

“…Eating Disorder Inventory‐3—Eating Disorder Risk Index (EDI‐3‐RF) (Garner, 2004; Argentinian adaptation: Rutsztein et al, 2013). The Index includes 25 items rated on a 6‐point Likert scale that assess attitudes and behaviors related to eating, weight and body image.…”

Topography and relationship-specific social touching in individuals displaying body image disturbances

“…The EDI-3 was validated in clinical and non‐clinical samples and has shown good internal consistency (α = between 0.75 and 0.92 for each subscale), and excellent sensitivity and specificity 98 . This questionnaire has largely been used previously with non-clinical 99 , 100 and subclinical populations 58 and has shown to be successful in identifying individuals at risk of an EDs 100 .…”

“…Participants were asked to rate each item on a Likert scale from a minimum of 0 (“not at all”) to a maximum of 4 (“much more than most people”). Total scores range from 0 to 28 with a critical value of 9 usually indicating clinical concern 99 . It should be noted that, compared to traditional scales measuring EDs risk (for example, the eating disorder examination-questionnaire 102 , 103 ), the DCQ measure different sets of psychopathological features at least in university student populations 104 .…”

Attitudes Toward Overweight and Their Association With Risk of Eating Disorder in Children. An Exploratory Study

“…Consiste en una serie de preguntas abiertas y cerradas que contemplan los criterios para el diagnóstico de trastorno alimentario del Manual Diagnóstico y Estadístico de los Trastornos Mentales (DSM-IV). Esta entrevista viene siendo utilizada en el marco de dos proyectos de investigación uBACyT financiados por la universidad de Buenos Aires, dirigidos por la última autora de este trabajo, y ha evidenciado buena capacidad discriminante en adolescentes de ambos sexos con y sin trastorno alimentario (Rutsztein, Murawski, Elizathe y Scappatura, 2010). Se le han realizado unas pequeñas modificaciones para adaptarla a niños/as, siguiendo las recomendaciones de Bryant-waugh, Cooper, Taylor y Lask (1996).…”