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Attention-deficit/hyperactivity disorder (ADHD) has long been associated with vulnerabilities to psychiatric and substance use disorders. To learn more, researchers examined data on four psychiatric disorders and two metabolic disorders in 5.6 million adults (age range, 18–64) from Swedish national registries; 1.1% were diagnosed with ADHD in adulthood according to International Classification of Diseases criteria.
Analyses adjusted for sex and age. Prevalence ratios (PRs) of comorbid anxiety, depression, and substance use disorder (SUD) were approximately nine times higher in individuals with ADHD than in the general population, PR of bipolar disorder was 20 times higher, and PRs of type 2 diabetes and hypertension were doubled. Among peopl…