title: The aetiology of mental retardation.
abstract: The aetiological factors related to mental retardation are tabulated and discussed. The data comprise part of the findings of a large scale sociological survey of mental retardation and show that approximately 65% of subjects classified as "mentally retarded" have a specific diagnosis.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001720:Birth Injuries / Q000150:complications; D002648:Child; D002675:Child, Preschool; D002869:Chromosome Aberrations / Q000453:epidemiology; D025063:Chromosome Disorders; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008607:Intellectual Disability / Q000453:epidemiology / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D009520:New Zealand; D012737:Sex Factors