RESUMEN
The point prevalence of Attentional Deficit Disorder with Hyperactivity is estimated in a random sample of 387 10-year-old children selected from the municipal census of the city of Valencia (Spain). A number of associated factors are described, along with the utilization of public health services. Diagnosis was established according to DSM-III-R criteria. The instruments used were: K-SADS-E; GAF Scale; Raven Progressive Matrices Test and Sociodemographic, Health and Services Use Information Questionnaire. Prevalence was estimated at 8.01 +/- 2.7% (mild 3.9%; moderate 3.9%; severe 0.3%). The male/female ratio was 2:1. Attentional Deficit Disorder with Hyperactivity was significantly associated with low academic performance and the condition of living with only one parent. These children made use of the psychological support services with significantly greater frequency than non hyperactive children, regardless of the degree of severity or academic performance.