Attention-Deficit/Hyperactivity Disorder (ADHD) is a prevalent neurodevelopmental condition affecting approximately 6.1 million children and about 4.6% of adults globally in 2025.
ADHD Overview and Prevalence
ADHD affects roughly 8% of children and adolescents worldwide, with boys twice as likely to be diagnosed as girls (10% boys vs. 5% girls)
Adult ADHD prevalence is estimated around 3.1% globally, reflecting underdiagnosis and growing awareness.
ADHD diagnosis varies by region and study type but remains stable in overall prevalence despite increased recognition.
What Is ADHD? Subtypes and Causes
ADHD is a brain-based, neurodevelopmental disorder characterised by differences in brain structure and neurotransmitter activity, primarily dopamine and norepinephrine.
The DSM-5 identifies three subtypes: predominantly inattentive (formerly ADD), predominantly hyperactive-impulsive, and combined type.
Causes include genetics (70-80% heritability), brain structure differences, and environmental factors such as premature birth and prenatal exposures.
Symptoms and Life Impact
Symptoms evolve across the lifespan: from hyperactive/impulsive behaviors in childhood to challenges with time management and organisation in adulthood.
Many children with ADHD also have learning disabilities or comorbid anxiety/depression.
Only about 20% outgrow symptoms; most learn coping skills to manage lifelong challenges
Evidence-Based Treatments: Beyond Medication
- Medication: Stimulants (e.g., Adderall, Ritalin) are effective in 70-80% of patients; non-stimulants offer alternatives.
- Behavioural Therapy: Cognitive Behavioral Therapy (CBT) and parent training improve coping and behavior.
- Lifestyle: Exercise boosts dopamine naturally; diets rich in protein and omega-3s may help focus.
- Emerging Therapies: Neurofeedback and FDA-approved video game therapy (EndeavorRx) show promise.
Practical Strategies for Living Well
Students benefit from breaking tasks into small steps and using distraction pads.
Adults improve outcomes by automating finances and scheduling demanding work during peak focus times.
Parents should provide immediate rewards and apply simple productivity rules.
Key Takeaways
It is brain-based, not a discipline issue.
Genetics + environment play key roles.
Treatment works best when combining medication, therapy, and lifestyle changes.
Adults need support too—it’s never too late for a diagnosis.