[Intelligence and school success in 16-year-old risk children and in a control group].

Report about part--results of a longterm follow-up--study with 123 sixteenged risk--children, which were treated with an exchange transfusion because of hemolytic disease in newborn age. The control group was paralleled to social--demographic criteria. Before all biological and social factors of influence the parental education and qualification level was the most influential social determinant on the development of intelligence and school-achievement. 33,3% of the risk group and 15,5% of the control group did not reach the 10th form of the polytechnical school according to their age.