MENTAL RETARDATION IN A NATIONAL POPULATION OF YOUNG MEN IN THE NETHERLANDS II. PREVALENCE OF MILD MENTAL RETARDATION

The prevalence of mild mental retardation in 19-year-old survivors of male births during 1944–1947 is derived from military records. The data are singular in that they are national, virtually complete for a total population of more than 400,000 men and include attributes not previously examined. They allow for the simultaneous use of three criteria: education (history of special schooling), psychometric (Raven intelligence test score), and clinical diagnosis (ICD (1948) 325.2, 325.3), which yielded rates per 1000 of 30, 58 and 61. respectively. Rates by all three criteria varied in similar fas... Mehr ...