Brain Differences Linked to Early Substance Use in Kids
Author Information
Author(s): Miller Alex P. PhD, Baranger David A. A. PhD, Paul Sarah E. MA, Garavan Hugh PhD, Mackey Scott PhD, Tapert Susan F. PhD, LeBlanc Kimberly H. PhD, Agrawal Arpana PhD, Bogdan Ryan PhD
Primary Institution: Indiana University School of Medicine
Hypothesis
What are the neuroanatomical features associated with early substance use initiation, and do they precede initiation?
Conclusion
The study found that certain brain structure features are associated with early substance use initiation, suggesting that these features may indicate a predisposition to substance use disorders.
Supporting Evidence
- Variability in brain structure was significantly associated with early substance use initiation.
- Thinner prefrontal cortex and greater whole brain volume were observed in children who initiated substance use.
- Most brain structure features associated with substance use initiation were evident among substance-naive children at baseline.
Takeaway
Kids who start using substances like alcohol or cannabis before age 15 may have different brain structures, which could mean they are more likely to start using these substances early.
Methodology
The study used data from the Adolescent Brain Cognitive Development Study, analyzing neuroimaging and substance use data from children aged 9 to 11 over a 3-year follow-up.
Potential Biases
Unmeasured confounders and undetected systemic differences in missing data may have influenced associations.
Limitations
The study may not have had enough power to detect effects for less frequently endorsed substances, and it could not determine whether brain differences were caused by substance exposure or were preexisting.
Participant Demographics
Participants included 5160 boys (52.6%) and 4644 girls (47.4%), with a mean age of 9.9 years; racial demographics included 76.1% White, 15.0% Black, 5.2% Hispanic/Latino, and others.
Statistical Information
P-Value
6.99×10−6
Confidence Interval
−0.02 to −0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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