The measurement of serum thyroxine in children.
A competitive protein-binding method was used to determine serum thyroxine concentration throughout childhood, adolescence, and in young adults. The values showed a gradual decrease as the child became older and reached adult levels by the time of adolescence. The range (mean +/- 2 SD mug/100 ml) for cord serum was 8.8-14.8; for 4 weeks to 11 years, 6.5-13.9; for 11 to 17 years, 5.4-12.2, and for young adults 6.0-11.2.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007456:Iodine Isotopes; D008722:Methods; D013974:Thyroxine / Q000097:blood*; D013975:Thyroxine-Binding Proteins; D014470:Umbilical Cord
D007456:Iodine Isotopes; D013975:Thyroxine-Binding Proteins; D013974:Thyroxine