Cited by 1,601Attention Deficit Hyperactivity DisorderAutism Spectrum Disorder ResearchSchizophrenia research and treatment

Prevalence and correlates of adult attention-deficit hyperactivity disorder: meta-analysis

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Simon, Viktória, Czobor, Pál, Bálint, Sára, Mészáros, Ágnes, Bitter, István·2009·British Journal of Psychiatry

Abstract

Background: In spite of the growing literature about adult attention-deficit hyperactivity disorder (ADHD), relatively little is known about the prevalence and correlates of this disorder. Aims: To estimate the prevalence of adult ADHD and to identify its demographic correlates using meta-regression analysis. Method: We used the MEDLINE, PsycLit and EMBASE databases as well as hand-searching to find relevant publications. Results: The pooled prevalence of adult ADHD was 2.5% (95% CI 2.1–3.1). Gender and mean age, interacting with each other, were significantly related to prevalence of ADHD. Metaregression analysis indicated that the proportion of participants with ADHD decreased with age when men and women were equally represented in the sample. Conclusions: Prevalence of ADHD in adults declines with age in the general population. We think, however, that the unclear validity of DSM–IV diagnostic criteria for this condition can lead to reduced prevalence rates by underestimation of the prevalence of adult ADHD.

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Crossref · 10.1192/bjp.bp.107.048827

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  • It is unclear whether the prevalence of adult ADHD changes with age.

    “it is unclear whether the prevalence of adult ADHD changes with age.”

    From The decreasing prevalence of ADHD across the adult lifespan confirmed (2022) · cites this paper as [7]

    The Results report a significant age-related decline in adult ADHD prevalence when men and women were equally represented, and the Conclusions state that prevalence declines with age in the general population. The paper says the cause of the observed decline is unclear, not whether its analysis found a change with age. The supplied passages have no page numbers. (LLM, conf=0.87)

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  • EG Willcutt estimated that the pooled prevalence of adult ADHD was 5.0% based on 11 studies published between 1996 and 2011 when defining adult ADHD with DSM-IV criteria.

    “When defining adult ADHD with the DSM-IV criteria, EG Willcutt estimated that the pooled prevalence of adult ADHD was 5.0% based on 11 studies published between 1996 and 2011 [15,16].”

    From The prevalence of adult attention-deficit hyperactivity disorder: A global systematic review and meta-analysis (2021) · cites this paper as [15]

    The Results and ‘Correlation of prevalence with gender and age’ sections report a pooled adult ADHD prevalence of 2.5% (95% CI 2.1–3.1) using strict DSM-IV criteria, not 5.0%. The paper does not attribute an 11-study estimate covering 1996–2011 to Willcutt. (LLM, conf=0.89)

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  • Adult ADHD prevalence is estimated at 2.5%.

    “A meta-analysis of six studies with over 5,300 participants estimated the prevalence of ADHD in adulthood to be 2.5%”

    From The World Federation of ADHD International Consensus Statement: 208 Evidence-based conclusions about the disorder (2021) · cites this paper as Simon et al., 2009

    The Results report a pooled adult ADHD prevalence of 2.5% (95% CI 2.1–3.1). The Abstract says six studies were omitted from 12 identified studies, consistent with six in the analysis, but the passages available from our copy do not substantiate the citing sentence’s figure of over 5,300 participants. (LLM, conf=0.83)

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  • Compared to childhood ADHD, adult ADHD has received far less research attention.

    “compared to childhood ADHD, adult ADHD has received far less research attention”

    From The decreasing prevalence of ADHD across the adult lifespan confirmed (2022) · cites this paper as [7]

    The Abstract says ADHD was long thought to occur only in childhood and that, despite growing literature on adult ADHD, relatively little was known about its adult prevalence and correlates. That supports a research gap concerning adult ADHD, but the paper does not establish that adult ADHD received far less research attention than childhood ADHD overall. (LLM, conf=0.76)

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  • Adult ADHD does rarely occur without other comorbid psychiatric symptoms and most adults with ADHD suffer from additional psychiatric disorders during their lifetime.

    “Furthermore, adult ADHD does rarely occur without other comorbid psychiatric symptoms and most adults with ADHD suffer from additional psychiatric disorders during their lifetime (Simon et al. 2009; de Zwaan et al. 2012).”

    From ADHD and associated psychopathology in older adults in a German community sample (2023) · cites this paper as Simon et al. 2009

    The Abstract (page not specified in our copy) describes ADHD as a serious risk factor for comorbid psychiatric disorders. It does not say that ADHD rarely occurs without them or that most adults with ADHD have an additional psychiatric disorder during their lifetime. (LLM, conf=0.84)

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Cites

Flagged first, then by citations

1 of the 69 references couldn’t be matched to a known paper.

Research works printed but not linked: 6

  1. [15]15. Barkley RA. Behavioral inhibition, sustained attention, and executive functions: constructive theory of ADHD. Psychol Bull 1997; 121: 65-94.
  2. [53]53. Ericsson KA, Simon HA. Verbal reports as data. Psychol Rev 1980; 87: 215-51.
  3. [54]54. Nisbett RE, Wilson TD. Telling more than we know. Psychol Rev 1977; 74: 231-59.
  4. [58]58. Yarrow MR, Campbell JD, Burton RV. Recollections of childhood. Monogr Soc Res Child Dev 1970; 35: 1-83.
  5. [59]59. Henry B, Moffitt TE, Caspi A, Langley J, Silva PA. On the 'remembrance of things past'. Psychol Assess 1994; 6: 92-101.
  6. [60]60. Holmshaw J, Simonoff E. Retrospective recall of childhood psychopathology. Int J Methods Psychiatric Res 1996; 6: 79-88.

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Authors
Simon, V., Czobor, P., Bálint, S., Mészáros, Á., & Bitter, I.
Affiliations
Semmelweis University (HU)
Corresponding author
Simon, Viktória
Venue
British Journal of Psychiatry
Published
2009-03
Volume
194
Issue
3
Pages
204-211
ISSN
  • 0007-1250 (ISSN-L)
  • 1472-1465
OpenAlex
W2117104588
Cited by
1,601
References
69
Citations by year
2026: 80 · 2025: 90 · 2024: 100 · 2023: 122 · 2022: 115 · 2021: 111 · 2020: 138 · 2019: 93 · 2018: 93 · 2017: 116 · 2016: 104 · 2015: 116 · 2014: 103 · 2013: 78 · 2012: 61
FWCI
5.76
Type
journal article
Language
en
Open access
Locations
  • The British Journal of Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Attention Deficit Hyperactivity Disorder
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
Keywords
adult ADHD, ADHD prevalence, demographic correlates, age differences, gender differences, DSM-IV diagnostic criteria, underestimation of prevalence, general population
MeSH terms
Adolescent, Adult, Age Factors, Aged, Aged, 80 and over, Attention Deficit Disorder with Hyperactivity, Female, Humans, Male, Middle Aged, Psychiatric Status Rating Scales, Regression Analysis, Sex Factors, Prevalence, Young Adult

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