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Identification of Primary Congenital Hypothyroidism Based on Two Newborn Screens - Utah, 2010-2016

David E Jones, Kim Hart, Stuart K Shapira

    MMWR. Morbidity and Mortality Weekly Report
    |July 20, 2018
    PubMed

    Insights

    A two-step newborn screening process for congenital hypothyroidism is more effective than a single screen. This method improves the detection of congenital hypothyroidism (CH) in infants, preventing cognitive impairment and growth issues.

    Area of Science:

    • Pediatrics
    • Endocrinology
    • Public Health

    Background:

    • Congenital hypothyroidism (CH) is a condition screened for in newborns, crucial for preventing cognitive impairment and growth issues.
    • The U.S. Recommended Uniform Screening Panel includes CH screening.
    • Untreated CH can lead to severe developmental complications.

    Purpose of the Study:

    • To evaluate the effectiveness of a two-screen newborn screening protocol for congenital hypothyroidism.
    • To determine if a single screening is sufficient for identifying CH cases.
    • To assess the utility of differential cutoff values for optimizing screening performance.

    Main Methods:

    • Retrospective analysis of newborn screening data from Utah (2010-2016).
    • Inclusion of 359,432 infants screened for CH.
    • Comparison of cases identified by first screen versus second screen.

    Main Results:

    • 130 cases of CH were diagnosed among 359,432 infants.
    • A significant percentage of CH cases (20%) were not identified by the initial screen alone.
    • The second screen identified additional cases, highlighting the value of a two-step approach.

    Conclusions:

    • A two-screen process for newborn CH screening is more effective than a single screen.
    • Implementing differential cutoff values for each screen can enhance sensitivity and specificity.
    • This optimized screening strategy improves early detection and management of CH.

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