| pubmed-article:6869424 | pubmed:abstractText | Serum immunoglobulin levels for IgA, IgE, IgG, and IgM were measured in 13 institutionalized, profoundly mentally retarded individuals and for 20 retarded and 29 intellectually average noninstitutionalized individuals. A significant elevation in IgG was observed for the retarded groups as compared with the intellectually average group. There was a significant inverse relationship between IgG and level of intellectual functioning. The elevated IgG is suggestive of the findings with auto-immune diseases and warrants further investigation. | lld:pubmed |
