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Objective: To study the validity of each of the DSM-IV items for the diagnosis of Attention Deficit Hyperactivity Disorder (ADHD), and to look for a reduced model of items that would allow prediction of ADHD. Method: We use the information from an epidemiological study of ADHD with a sample of 1095 children. Of these, 6.6 % are ADHD cases. ADHD cases are defined according to ADHD RS-IV and DSM-IV clinical criteria. Controls are defined by exclusion. Results: The model of logistic regression that best predicts the inattentive phenotype is composed of the ADHD RS-IV (teachers’ version) items 5, 7, 13, 15 and 17 (Sensitivity: 88.7%, Specificity: 84.2%); the hyperactive / impulsive phenotype by the items 2, 4, 8 and 16 (Sensitivity: 86.4%, Specificity: 83.7%) and the combined phenotype by the items 2, 6, 15, 16 and 17 (Sensitivity: 91.6%, Specificity: 84.4%). A reduction of 72.2 % of the items in the combined phenotype is detected. Conclusions: It is possible to reduce the list of ADHD symptoms with satisfactory levels of validity and not all the items should have the same weight when making diagnostic decisions.

Validez de los Criterios DSM-IV según Respuesta de los Profesores en el Diagnóstico del Trastorno por Déficit de Atención con Hiperactividad