Familial-genetic factors in the etiology of attention deficit disorder (ADDH) were studied in 145 children who met the DSM-III criteria at the Neuropediatrics Unit, Shaare Zedek Medical Center, Jerusalem, Israel. Boys outnumbered girls by 3:1. 30% of ADDH children had siblings with LD, compared to 6.7% in 30 normal children. 34% of ADDH children were of North African descent which comprised only 12% of the population in Jerusalem. ADDH was correlated with delayed language development and intrauterine growth retardation. No correlation was found between ADDH and numerous pre- and peri-natal factors, IQ, parental age, years of education, profession, and language spoken at home. 
COMMENT. A familial-genetic factor has been implicated in the etiology of ADHD in previous studies and the present report supports this finding. The familial-genetic factor was expressed by the male preponderance, the increased frequency of learning disabilities in siblings and an ethnic propensity. A delay in language development should alert the pediatrician to the possible development of ADDH and the need for early intervention programs. The benefits of early educational programs for parents concerning methylphenidate in the treatment of ADHD are demonstrated in a report from The Children’s Hospital of Michigan, Detroit . Before educational intervention families rated behavior modification as the most acceptable and methylphenidate as the least acceptable method of management. After 3-1/2 months experience with interventions for their children there was a significant increase in acceptability of methylphenidate related to the parental education about ADHD.