Abstract
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.
Palabras clave: Trastorno de la conducta alimentaria, Anorexia nerviosa, Bulimia nerviosa, Cribado, Adolescentes
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.
Key words: Eating behaviour disorder, Anorexia nerviosa, Bulimia nerviosa, Screening, Adolescents
Footnotes
Trabajo producto del proceso de investigación formativa de la Facultad de Medicina de la Universidad Autónoma de Bucaramanga.
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