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Comparative Study
. 2005 Feb 15;35(2):89-94.
doi: 10.1157/13071915.

[Validation of the SCOFF questionnaire for screening the eating behaviour disorders of adolescents in school]

[Article in Spanish]
G E Rueda Jaimes  1 , L A Díaz Martínez, D P Ortiz Barajas, C Pinzón Plata, J Rodríguez Martínez, L P Cadena Afanador
Affiliations
Comparative Study

[Validation of the SCOFF questionnaire for screening the eating behaviour disorders of adolescents in school]

[Article in Spanish]
G E Rueda Jaimes et al. Aten Primaria. .

Abstract
in English, Spanish

Objective: To determine the internal consistency and criteria validity of the SCOFF questionnaire for screening adolescent eating behaviour disorders.

Design: Validation study with stochastic sampling.

Setting: Three schools at Bucaramanga, Colombia.

Participants: 241 students selected at random from 1595 possible ones.

Main interventions: SCOFF questionnaire and semi-structured CIDI interview, administered independently.

Main measurements: Social and personal details, Cronbach's alpha, sensitivity analysis, specificity, forecast values, Cohen mean kappa test, and ROC curve.

Results: Sensitivity found was 81.9% (95% CI, 70.7-89.7) and specificity, 78.7% (95% CI, 71.7-84.6). The area under the ROC curve was 0.8596 (95% CI, 0.8108-0.9084); the Cronbach's alpha test, 0.436, and the Cohen mean kappa, 0.554 (95% CI, 0.425-0.683).

Conclusions: The SCOFF questionnaire is an acceptable alternative for screening groups of adolescents because of its simplicity and speed of administration.

Objetivo: Determinar la consistencia interna y la validez de criterio del cuestionario SCOFF en adolescentes para el cribado de los trastornos de la conducta alimentaria (TCA).

Diseño: Estudio de validación con muestreo probabilístico.

Emplazamiento: Tres colegios en Bucaramanga, Colombia.

Participantes: Un total de 241 estudiantes seleccionadas al azar entre 1.595 elegibles.

Intervenciones principales: Cuestionario SCOFF y entrevista semiestructurada CIDI, aplicados de manera independiente.

Mediciones principales: Características demográficas, prueba alfa de Cronbach, análisis de sensibilidad, especificidad, valores predictivos, prueba kappa media de Cohen y curva ROC.

Resultados: La sensibilidad encontrada fue del 81,9% (intervalo de confianza [IC] del 95%, 70,7-89,7) y la especificidad, del 78,7% (IC del 95%, 71,7-84,6). El área bajo la curva ROC fue de 0,8596 (IC del 95%, 0,8108-0,9084); la prueba alfa de Cronbach fue de 0,436 y la kappa media de Cohen, de 0,554 (IC del 95%, 0,425-0,683).

Conclusiones: El cuestionario SCOFF es una alternativa aceptable para el cribado de grupos de población adolescente por su sencillez y rapidez de administración.

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