Core signal
What: The World Federation of ADHD (WFADHD) selected only large-scale studies (2,000+ participants) or meta-analyses of 5+ studies to derive 208 evidence-based conclusions about ADHD.
PRO Summary
How to read this card
Evidence scope
Who: All individuals and caregivers who need scientific consensus on the nature, course, causes, and treatment of ADHD.
Use principle
Result: This consensus statement confirmed ADHD as a real neurodevelopmental disorder related to brain developmental processes. Twin and adoption studies indicate a substantial genetic contribution at the population level (estimated ~74%), and neuroimaging studies have observed group-level structural and functional differences. However, this figure is a population-level statistical estimate, not a predictor of individual diagnosis.
Evidence Reading
What to check when interpreting the evidence
Study typeType: InternationalConsensusStatement
PopulationTarget: All ADHD (80 authors, 27 countries, 366 endorsers)
EvidenceGrade: A
UseResult: This consensus statement confirmed ADHD as a real neurodevelopmental disorder related to brain developmental processes. Twin and adoption studies indicate a substantial genetic contribution at the population level (estimated ~74%), and neuroimaging studies have observed group-level structural and functional differences. However, this figure is a population-level statistical estimate, not a predictor of individual diagnosis.
Consultation Prep
Turn the card into questions before consultation
When you hear claims that "ADHD is made up" or "ADHD is just a lack of willpower," you can reference the existence of this consensus statement.
Record this as a question or context point before professional consultation.
If you face misunderstanding about your child's ADHD diagnosis, it may help to share the context that "80 experts from 27 countries agreed on these scientific conclusions."
Record this as a question or context point before professional consultation.
You can ask your specialist, "I'd like to learn more about the biological basis of ADHD."
Record this as a question or context point before professional consultation.
Limits
PRO use principles
Evidence scope
Limitations: A synthesis of existing research, not new experimental findings. "Substantial genetic contribution" does not mean ADHD is genetically determined — environmental factors also play a role. Brain imaging differences are group-level findings and not individual diagnostic tools.
Hold individual application
Do not transfer group-level findings or review summaries directly to an individual case without considering family context, school context, comorbidity, and professional guidance.
Use principle
Disclaimer: This summary is for informational purposes only. All decisions regarding diagnosis, treatment, and medication should be made in consultation with a qualified physician.
Professional consultation
Diagnosis, treatment, medication, educational planning, and ADHD management should be discussed with qualified professionals.
Scope Note
Notice and limits
Limitations: A synthesis of existing research, not new experimental findings. "Substantial genetic contribution" does not mean ADHD is genetically determined — environmental factors also play a role. Brain imaging differences are group-level findings and not individual diagnostic tools.
Disclaimer: This summary is for informational purposes only. All decisions regarding diagnosis, treatment, and medication should be made in consultation with a qualified physician.