THE DIAGNOSIS OF CHILDHOOD HYPERACTIVITY A U.S.‐U. K. CROSS‐NATIONAL STUDY OF DSM—III and ICD‐9

Abstract
The unequal prevalence of hyperactivity in Britain and the U.S. was investigated with a cross-national diagnostic study. Case histories of 6-11-yr-old boys were evaluated by British and American research teams as well as British and American clinician panels using both ICD-9 and DSM-III. Interrater agreement was acceptably high only for the specially trained research teams. ICD-9 generated fewer diagnoses of Hyperkinetic Syndrome than did DSM-III of Attention Deficit Disorder with Hyperactivity. The difference was greatest for U.K. clinicians. Diagnostic scheme and clinician training both contribute to the difference in reported rates.

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