The Role of Genes in Impulsivity and ADHD in Children
Author Information
Author(s): Robert D Oades, Jessica Lasky-Su, Hanna Christiansen, Stephen V Faraone, Edmund JS Sonuga-Barke, Tobias Banaschewski, Wai Chen, Richard JL Anney, Jan K Buitelaar, Richard P Ebstein, Barbara Franke, Michael Gill, Ana Miranda, Herbert Roeyers, Aribert Rothenberger, Joseph A Sergeant, Hans-Christoph Steinhausen, Eric A Taylor, Margaret Thompson, Philip Asherson
Primary Institution: University of Duisburg-Essen, Essen, Germany
Hypothesis
Are serotonin and other genes associated with impulsive behavioral aggression and cognitive impulsivity in children with ADHD?
Conclusion
The study found genetic influences on impulsivity in children with ADHD, particularly linking serotonin-related genes to cognitive impulsivity.
Supporting Evidence
- Two SNPs from the PNMT gene showed significant association with cognitive impulsivity.
- Nominal significance was found for 12 SNPs from various genes related to ADHD.
- Six SNPs from five genes attained nominal significance for impulsive behavioral aggression.
Takeaway
This study looked at how certain genes might make kids with ADHD act impulsively or aggressively. It found that some genes related to serotonin are important for understanding these behaviors.
Methodology
The study used a family-based association test (FBAT) to analyze the relationship between impulsivity and genetic markers in children with ADHD.
Potential Biases
Potential bias due to the use of lay responses to questionnaires for symptom assessment.
Limitations
The study's sample size, while reasonable, could be larger to detect modest genetic effects, and the reliance on questionnaire responses may limit the accuracy of symptom interpretation.
Participant Demographics
The sample consisted of 1180 offspring from 607 families, predominantly European Caucasian, aged 5-17 years, with a majority being male (67.2%).
Statistical Information
P-Value
0.003818
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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