10th Edition - World Health Organization, 1990 (ICD-10)
CRITERIA FOR HYPERKINETIC DISORDER
A. Demonstrate abnormality of attention and activity at HOME, for the age and developmental level of the child, as evidenced by at least three of the following attention problems:
B. Demonstrate abnormality of attention and activity at SCHOOL or NURSERY (if applicable), for the age and developmental level of the child, as evidenced by at least two of the following attention problems:
C. Directly observed abnormality of attention or activity. This must be excessive for the child's age and developmental level. The evidence may be any of the following:
D. Does not meet criteria for pervasive developmental disorder, mania, depressive or anxiety disorder.
E. Onset before the AGE OF 6 YEARS.
F. Duration of AT LEAST 6 MONTHS.
G. IQ above 50.
Note: The research diagnosis of Hyperkinetic disorder requires the definite presence of abnormal levels of inattention and restlessness that are pervasive across situations and persistent over time, that can be demonstrated by direct observation, and that are not caused by other disorders such as autism or affective disorders.
Eventually, assessment instruments should develop to the point where it is possible to take a quantitative cut-off score on reliable, valid and standardised measures of hyperactive behaviour in the home and classroom, corresponding to the 95th percentile on both measures. Such criteria would then replace A and B above.
*From the International Classification of Diseases (10th Ed.). World Health Organization, Geneva, 1990 © WHO