558 students were recruited for the study.
The study was authored by Matthew McBee, Rebecca Brand, and Wallace Dixon, Jr.
The study was released in the journal JAMA Pediatrics.
The findings appeared in the peer-reviewed journal Environmental Health Perspectives.
The results appeared in Brain Sciences.
The study was conducted by researchers at the Karolinska Institutet.
The study includes the health records of about 30,000 patients collected over a span of 10 years, mostly within the Duke University Health System.
The study was conducted at the Swedish Örebro Universitet.
"The structural variants highlighted by our study warrant further study and confirmation."
For the study, the US-based research team turned to brain imaging analysis of certain regions in 315 participants aged 7-13, the majority of which were diagnosed with ADHD.