Abstract
Context: Transient hypothyroxinemia of prematurity (THoP) has been associated with neurodevelopmental impairment in infancy and childhood. It is not known whether these relations persist into adulthood.
Objective: The objective was to examine whether there is an effect of THoP on intelligence quotient (IQ) score and motor functioning at a young adult age.
Design: This study was part of the 19-year follow-up of the Project On Preterm and Small-forgestational-age birth (POPS) cohort, which included infants born very preterm (ie,32 wk) and/or with a very low birth weight (ie, 1500 g).
Setting: This was a multicenter study.
Patients: There were 398 19-year-old participants of the POPS cohort, of whom 120 had THoP.
Exposure: T4 concentrations were obtained through the national neonatal screening program for congenital hypothyroidism.THoP was defined as a total T4 concentration< -3 SD of the daily mean (approximately 60 nmol/L).
Main Outcome Measures: Main outcome measures were IQ and motor functioning, measured with the digital Multicultural Capacities Test-Intermediate Level and a revised version of Touwen’s examination of minor neurological dysfunction, respectively.
Results: THoP was not associated with IQ score (mean difference, 0 [95% confidence interval,3.8 to 3.8] points) or motor function (mean difference, 0.6 [95% confidence interval, 1.3 to 2.5] points) after adjustment for demographic and perinatal characteristics.
Conclusions: No associations between THoP and neurodevelopmental outcome at age 19 years were found.
| Original language | English |
|---|---|
| Pages (from-to) | 4648-4653 |
| Number of pages | 6 |
| Journal | Journal of Clinical Endocrinology and Metabolism |
| Volume | 100 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 1 Dec 2015 |
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