Factor structure and psychometric properties of the TFEQ in morbid obese patients, candidates to bariatric surgery

• Autores: Diana Taboada, Mercedes Navío Acosta, Rosa Jurado Barba, Vanesa Fernández-López, Carmen Bayón, María José Álvarez, Isabel Morales, Guillermo Ponce Alfaro, Gabriel Rubio Valladolid, José Carlos Mingote Adán, Felipe Cruz, Miguel Ángel Jiménez
• Localización: Psicothema, ISSN-e 1886-144X, ISSN 0214-9915, Vol. 27, Nº. 2, 2015, págs. 141-150
• Idioma: inglés
• DOI: 10.7334/psicothema2014.46
• Títulos paralelos:
  • Estructura factorial y propiedades psicométricas del TFEQ en pacientes con obesidad mórbida candidatos a cirugía bariátrica
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• Resumen
  • español

    Antecedentes: analizar la estructura factorial y las propiedades psicométricas del TFEQ en una muestra española de obesos mórbidos candidatos a cirugía bariátrica. Método: se realizó un análisis multi-rasgo/multi-ítem y de coeficientes alpha para probar la validez convergente/discriminante y la consistencia interna. Se utilizó un análisis de componentes principales (varimax) para estudiar la estructura factorial. Se llevó a cabo también un análisis de factores de subgrupos por género, edad e IMC para identificar aquellos ítems inestables. Resultados: la estructura interna original de los 3 factores TFEQ fue insatisfactoria, especialmente en la escala de Desinhibición. La mayoría de los ítems de Desinhibición y Hambre se agruparon en un mismo factor denominado "Desregulación en la ingesta". La Restricción Cognitiva se dividió en dos factores. El primero, relacionado con el componente de Restricción, se denominó "Restricción Activa" y el segundo, relacionado con el peso y las preocupaciones de la ingesta, se llamó "Predisposición a la Restricción". Conclusiones: la estructura factorial original del TFEQ no se replica. En este artículo se presenta un instrumento revisado de 23 ítems, que representa los tres nuevos factores derivados, como instrumento de cribado válido para pacientes obesos graves

  • English

    Background: To analyze the factor structure and psychometric properties of the TFEQ in a morbid obese Spanish sample of bariatric surgery candidates. Method: Multi-trait/ multi-item analyses and alpha coefficients were conducted to test the convergent /discriminant validity and the internal consistency reliability. Principal components analyses (varimax) were used to explore the factor structure. Sub-group factor analyses by gender, age and body mass index (BMI) were conducted to identify unstable items. Results: The internal structure of the original TFEQ factors was unsatisfactory, especially the Disinhibition Scale. Most Disinhibition and Hunger items were grouped on one factor labeled "Dysregulation Eating". Cognitive Restraint was split into two factors. The first one, related to the behavioral component of Restraint, labeled "Restrained Behaviour" and the second one related to weight and eating concerns called "Predisposition to Restraint". Conclusions: The original factor structure of the TFEQ was not replicated. A revised 23-item instrument, representing the three new derived factors is offered as a valid screening instrument for severely obese patients.

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