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  • Title: Effect of L-thyroxine supplementation on very low birth weight infants with transient hypothyroxinemia of prematurity at 3 years of age.
    Author: Uchiyama A, Kushima R, Watanabe T, Kusuda S.
    Journal: J Perinatol; 2017 May; 37(5):602-605. PubMed ID: 28125093.
    Abstract:
    OBJECTIVE: To evaluate the effects of levothyroxine (L-T4) supplementation on growth and neurodevelopmental outcomes at 3 years of age in very low birth weight (VLBW) infants with transient hypothyroxinemia of prematurity (THOP). STUDY DESIGN: VLBW infants with plasma thyroid-stimulating hormone concentrations <10 mIU l-1 and free thyroxine concentrations <0.8 ng dl-1 were defined as having THOP and randomly assigned to the Treated (20 infants) or Untreated (31 infants) group. The Treated group received L-T4 at a dose of 5 μg kg-1 day-1. Growth and neurodevelopmental outcomes at 3 years of age were compared between the two groups. RESULTS: There were no significant differences in body length, body weight or head circumference mean s.d. scores or in neurodevelopmental outcomes between the two groups. CONCLUSION: L-T4 supplementation in VLBW infants with THOP demonstrated no beneficial effect at 3 years of age.
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