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Evelyn B. Man, PhD; Maurice Adelman, MD; Walter S. Jones, MD; Robert M. Lord, Jr., MD

Am J Dis Child. 1970;119(4):298-307.

Abstract
Serum thyroxine-like iodine compounds (BEI) are essential for normal central nervous system development, but thyroid function tests of full-term and of low-birth-weight infants have not been defined through 18 postnatal months. For 49 full-term infants (normal BEI through five postnatal days 7.2µg to 15.2µg per 100 ml), median and mean BEI from two to six postnatal months were 6.2 ± 0.91 and from 6 to 18 months 5.8µg ± 0.87µg per 100 ml, significantly higher BEI values than for adults. Differences between BEI means of low-birth-weight infants born before and after 34 gestational weeks and of full-term infants were significant at the 0.001 level. Fifteen low-birth-weight infants with BEI determinations until 19 months were examined developmentally; nine, classified normal, appeared to have increasing BEI; six, classified suspect or abnormal, had low or borderline BEI.

Author Affiliations
Providence, RI

From the Thyroid Laboratory, Providence Lying-In Hospital and Institute of Life Sciences, Brown University, Providence, RI.

Footnotes
Received for publication May 15, 1969.

Reprint requests to Thyroid Laboratory, Providence Lying-In Hospital, 50 Maude St, Providence, RI 02908 (Dr. Man).

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