title: Thyroid-function assessment by use of enzyme immunoassays.
abstract: We used an enzyme immunoassay to determine the normal reference intervals for thyroxin, triiodothyronine, and thyrotropin in groups of children, ranging from newborns to 15-year-olds. Results compared well with those by radioimmunoassay. There were no substantial differences between plasma and serum samples for thyroxin and triiodothyronine, but thyrotropin concentrations differed significantly (p less than 0.05, n = 20 each).
mesh_terms: D000293:Adolescent; D055598:Chemical Phenomena; D002621:Chemistry; D002648:Child; D002675:Child, Preschool; D005260:Female; D005312:Fetal Blood / Q000032:analysis; D006801:Humans; D007124:Immunoenzyme Techniques; D007223:Infant; D008297:Male; D013960:Thyroid Function Tests; D013961:Thyroid Gland / Q000502:physiology*; D013972:Thyrotropin / Q000097:blood; D013974:Thyroxine / Q000097:blood; D014284:Triiodothyronine / Q000097:blood
chemical_list: D014284:Triiodothyronine; D013972:Thyrotropin; D013974:Thyroxine