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Longitudinal Temperament Pathways to ADHD Between Childhood and Adolescence
Michelle M Martel1, Anjeli R Elkins2, Ashley G Eng2
1Psychology Department, University of Kentucky, Lexington, USA. michelle.martel@uky.edu.
Research on Child and Adolescent Psychopathology
|February 1, 2022
Summary
Genetic and prenatal risk factors influence ADHD symptoms through distinct developmental pathways. Prenatal smoking impacts hyperactivity, while genetic risk affects inattention, mediated by specific childhood traits.
Area of Science:
- Neuroscience
- Developmental Psychology
- Genetics
Background:
- Attention-Deficit/Hyperactivity Disorder (ADHD) etiology is complex, involving genetic and environmental factors.
- Prior research established cross-sectional links between ADHD symptoms, etiological factors, and traits like effortful control and surgency.
- Longitudinal investigation is crucial for understanding developmental pathways of ADHD.
Purpose of the Study:
- To examine longitudinal pathways from polygenic risk and prenatal smoking to ADHD symptoms.
- To investigate the mediating roles of childhood effortful control and surgency.
- To explore age-related variations in these mediational pathways.
Main Methods:
- Utilized an accelerated longitudinal design with 849 children from the Oregon ADHD-1000 Cohort.
- Tracked development from childhood (ages 7-13) to adolescence (ages 13-19).
- Analyzed mediational pathways from polygenic risk and prenatal smoking to ADHD symptom dimensions (inattention, hyperactivity-impulsivity).
Main Results:
- Prenatal smoking significantly predicted hyperactivity-impulsivity in early childhood, mediated by surgency.
- Polygenic risk significantly predicted inattention in adolescence, mediated by effortful control.
- These pathways were independent of the association between ADHD symptom dimensions and controlled for alternative etiological inputs.
Conclusions:
- Supports dual pathway models of ADHD, differentiating etiological influences.
- Prenatal risk for hyperactivity-impulsivity appears mediated by surgency.
- Polygenic risk for inattention appears mediated by effortful control, with distinct developmental trajectories.
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