Longitudinal data revealed that individuals with ADHD were at higher risk for all-cause and cause-specific premature death, which may increase depending on the number of psychiatric comorbidities. “Improved understanding of the potential contributions by psychiatric comorbidity for associations between ADHD and premature death could substantially facilitate surveillance, intervention and prevention efforts,” Shihua Sun, MD, from the Karolinska Institutet in Stockholm, and colleagues wrote in JAMA Psychiatry.