Adult ADHD and comorbid anxiety and depressive disorders: a review of etiology and treatment

Summary & key facts

This review explains that many adults with ADHD also have anxiety or depression. Studies report that these co-occurring conditions are common, make symptoms worse, and make diagnosis and treatment harder. The review finds biological, cognitive, and imaging evidence that may help explain the overlap, and it summarizes treatments that combine medicines with psychotherapy (like CBT) and digital tools, which have shown symptom and quality-of-life improvements but need more study.

Key facts:

• About 5–7% of children have ADHD, and roughly 50–70% of those childhood cases continue into adulthood.
• Population estimates place adult ADHD prevalence at about 2–3%; one meta-analysis gave 2.58% for persistent (childhood-onset) and 6.76% for symptomatic adult ADHD.
• About 70% of adults with ADHD have at least one other mental health condition.
• Anxiety disorders affect an estimated 25–50% of people with ADHD; some studies reported rates of about 47% and 56% in samples of adults with ADHD.
• Depressive disorders in people with ADHD have been reported at rates ranging from 18.6% to 53.3% in different studies.
• Adults with both ADHD and anxiety or depression tend to have greater overall illness burden, longer illness duration, and lower treatment effectiveness than people with a single disorder.
• The review describes multiple possible contributors to comorbidity, including genetics, neurobiology, neurocognitive deficits (like working memory problems), and neuroimaging findings.
• Overlap in symptoms (for example, inattention from ADHD versus concentration problems from depression or anxiety) makes clinical diagnosis and treatment more difficult.
• Combined approaches—medication plus non-drug treatments such as cognitive-behavioral therapy (CBT) and digital therapeutics—have been reported to improve symptoms and quality of life in patients with comorbid ADHD and anxiety or depression.

Abstract

ADHD is a highly heterogeneous disorder with a significant comorbidity rate. Recent research has elucidated the pathogenetic mechanisms of ADHD comorbid with depression and anxiety disorders from multiple perspectives. To improve patient functioning, enhance their quality of life, and guide more effective treatments, Further studies are needed to investigate the underlying causes of these comorbid conditions.

Topics

Attention Deficit Hyperactivity Disorder Child and Adolescent Psychosocial and Emotional Development Children's Physical and Motor Development

Categories

Health Sciences Medicine Psychiatry and Mental health

Tags

Anxiety Attention deficit hyperactivity disorder Clinical psychology Comorbidity Depression (economics) Economics Etiology Macroeconomics Major depressive disorder Medicine Mood Psychiatry Psychology

Conditions & symptoms

Anxiety Anxiety or worry Difficulty focusing Lack of energy or motivation Poor sleep Sadness or low mood