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Evidence / 2021

consensus

The World Federation of ADHD International Consensus Statement: 208 Evidence-based conclusions about the disorder

Faraone SV, Banaschewski T, Coghill D, et al. (2021). Neuroscience & Biobehavioral Reviews.

Population
People with ADHD across the lifespan
Sample
Evidence catalogue / consensus (not a single sample)
Condition
ADHD
Medication focus
ADHD treatments as reviewed in the consensus literature
Jurisdiction
International
Last reviewed
1 September 2026
PMID
33549739
DOI
10.1016/j.neubiorev.2021.01.022

Plain-language finding

An international consensus statement cataloguing evidence-based conclusions about ADHD, including that it is a valid diagnosis, often persists into adulthood, frequently co-occurs with other conditions, and that pharmacological treatments can be effective for many people.

Important limitation

Consensus statements summarise a literature. Individual conclusions vary in strength. Not a treatment protocol for an individual.

Why we cite this

Broad, cited international synthesis of what is well-supported about ADHD as a condition.

adhd · consensus · comorbidity · validity · nd-overlap · psych-comorbidity · stigma

Supported by clinical guidelines, regulatory information, systematic reviews, or well-established pharmacological knowledge. Still describes populations, not an individual.

PubMedOriginal source

Claims this source supports

  • For many people with ADHD, stimulant medicines can reduce core ADHD symptoms compared with placebo. That is a population finding, not a promise that a particular medicine will help a particular person.

    Last reviewed 1 September 2026

  • ADHD and depression commonly co-occur. A person can have both. Treating one does not automatically resolve the other, and a later ADHD recognition does not mean an earlier depression diagnosis was simply wrong.

    Last reviewed 1 September 2026

  • ADHD and autism commonly co-occur. They were not formally allowed as co-diagnoses until DSM-5 (2013). Having one does not rule out the other, and treating one does not automatically treat the other.

    Last reviewed 1 September 2026

  • Depression, anxiety, sleep disorders, OCD, trauma-related conditions, substance-use problems and eating disorders commonly co-occur with ADHD and/or autism. They may be separate, interacting, or both. A later developmental diagnosis does not mean the psychiatric diagnosis was imaginary.

    Last reviewed 1 September 2026

  • Different parts of a person's profile are often recognised at different points in life. In children with both ADHD and autism, those whose ADHD was identified first have been observed to receive an autism diagnosis later. A later diagnosis does not automatically invalidate an earlier one.

    Last reviewed 1 September 2026

  • Rising ADHD diagnosis and medicine dispensing in Australia are evidence of rising recognised demand. They are not, by themselves, evidence that underlying ADHD prevalence has increased by the same factor. Prevalence, recognition, diagnosis and service demand are different quantities.

    This claim retains disagreement in the literature. Open the classification to read both sides.

    Last reviewed 2 September 2026

  • More people being recognised is observable. More people seeking assessment is observable. More people receiving ADHD medication is observable. A sudden increase in the underlying prevalence of ADHD since 2020 is not currently established.

    This claim retains disagreement in the literature. Open the classification to read both sides.

    Last reviewed 2 September 2026

  • Clinical guidelines model ADHD as a persistent pattern of inattention and/or hyperactivity-impulsivity, with features present in more than one setting and with several signs in childhood, even if recognition comes later. Educational examples of those features are not a diagnostic test, a severity score, or a reason to start or stop a medicine.

    Last reviewed 1 September 2026