ABSTRACT
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.
Subject(s)
Adolescent Behavior , Feeding Behavior , Feeding and Eating Disorders/diagnosis , Surveys and Questionnaires , Adolescent , Adult , Child , Colombia , Female , Humans , Mass Screening/methods , Schools , Sensitivity and SpecificityABSTRACT
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
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, Cronbachs 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 Cronbachs 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
