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Associations between birth weight and attention-deficit/hyperactivity disorder symptom severity: indirect effects

Burt Hatch, Dione M Healey, Jeffrey M Halperin

    Journal of Child Psychology and Psychiatry, and Allied Disciplines
    |May 6, 2014
    PubMed

    Insights

    Low birth weight is linked to increased Attention-Deficit/Hyperactivity Disorder (ADHD) symptom severity in preschoolers. This association is mediated by primary neuropsychological functioning, not higher-order cognitive processes.

    Area of Science:

    • Neuroscience
    • Developmental Psychology
    • Pediatrics

    Background:

    • Attention-Deficit/Hyperactivity Disorder (ADHD) has complex origins, often involving neuropsychological disruptions.
    • Low birth weight serves as an indicator of prenatal environmental challenges.
    • Understanding the pathways from birth weight to ADHD is crucial for early intervention.

    Purpose of the Study:

    • To investigate the indirect relationship between low birth weight and ADHD symptom severity in preschoolers.
    • To determine if neuropsychological functioning mediates the association between birth weight and ADHD symptoms.

    Main Methods:

    • 197 preschool-aged children participated in a longitudinal study.
    • Two neuropsychological factors were derived: 'Primary Neuropsychological Function' (Sensorimotor, Visuospatial) and 'Higher-Order Function' (Language, Memory).
    • Statistical analyses explored mediation effects of these factors on the birth weight-ADHD severity link.

    Main Results:

    • Both primary and higher-order neuropsychological factors correlated with ADHD symptom severity.
    • Only the Primary Neuropsychological Factor showed an association with birth weight.
    • Birth weight indirectly predicted ADHD symptom severity through its impact on Primary Neuropsychological Function.

    Conclusions:

    • Low birth weight is indirectly associated with ADHD severity in preschoolers.
    • This association is mediated by disruptions in primary neuropsychological functions.
    • Higher-order cognitive functions appear less involved in this specific pathway.
    Abstract

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