Cited by 10Attention Deficit Hyperactivity DisorderGenomic variations and chromosomal abnormalitiesGenetic Associations and Epidemiology

Rare copy number variants in males and females with childhood attention-deficit/hyperactivity disorder

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Jung, Benjamin, Ahn, Kwangmi, Justice, Cristina, Norman, Luke, Price, Jolie, Sudre, Gustavo, Shaw, Philip·2023·Molecular Psychiatry

Abstract

While childhood attention-deficit/hyperactivity disorder (ADHD) is more prevalent in males than females, genetic contributors to this effect have not been established. Here, we explore sex differences in the contribution of common and/or rare genetic variants to ADHD. Participants were from the Adolescent Brain and Cognitive Development study (N = 1253 youth meeting DSM-5 criteria for ADHD [mean age = 11.46 years [SD = 0.87]; 31% female] and 5577 unaffected individuals [mean age = 11.42 years [SD = 0.89]; 50% female], overall 66% White, non-Hispanic (WNH), 19% Black/African American, and 15% other races. Logistic regression tested for interactions between sex (defined genotypically) and both rare copy number variants (CNV) and polygenic (common variant) risk in association with ADHD. There was a significant interaction between sex and the presence of a CNV deletion larger than 200 kb, both in the entire cohort (β = -0.74, CI = [-1.27 to -0.20], FDR-corrected p = 0.048) and, at nominal significance levels in the WNH ancestry subcohort (β = -0.86, CI = [-1.51 to -0.20], p = 0.010). Additionally, the number of deleted genes interacted with sex in association with ADHD (whole cohort. β = -0.13, CI = [-0.23 to -0.029], FDR-corrected p = 0.048; WNH. β = -0.17, CI = [-0.29 to -0.050], FDR-corrected p = 0.044) as did the total length of CNV deletions (whole cohort. β = -0.12, CI = [-0.19 to -0.044], FDR-corrected p = 0.028; WNH. β = -0.17, CI = [-0.28 to -0.061], FDR-corrected p = 0.034). This sex effect was driven by increased odds of childhood ADHD for females but not males in the presence of CNV deletions. No similar sex effect was found for CNV duplications or polygenic risk scores. The association between CNV deletions and ADHD was partially mediated by measures of cognitive flexibility. In summary, CNV deletions were associated with increased odds for childhood ADHD in females, but not males.

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  • Neurochemical and genetic studies suggest men may carry a greater burden of rare structural variants, whereas women may require a higher polygenic threshold to manifest ADHD-supporting a proposed female protective effect.

    “men may carry a greater burden of rare structural variants, whereas women may require a higher polygenic threshold to manifest ADHD [136]—supporting a proposed female protective effect”

    From ADHD in Adulthood: Clinical Presentation, Comorbidities, and Treatment Perspectives (2025) · cites this paper as [136]

    The Discussion reports increased rare CNV deletions in females with ADHD, not males. It also reports no sex difference in polygenic risk, so the proposed higher polygenic threshold for females is not supported; the Introduction describes a broader female protective-effect theory based on genetic liability, not that specific finding. (LLM, conf=0.90)

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Research works printed but not linked: 2

  1. [53]Wechsler D Wechsler Intelligence Scale for Children 5th ed. Bloomington, MN: Pearson; 2014.
  2. [58]Demontis D, Walters GB, Athanasiadis G, Walters R, Therrien K, Farajzadeh L, Genome-wide analyses of ADHD identify 27 risk loci, refine the genetic architecture and implicate several cognitive domains [Internet]. medRxiv; 2022 [cited 2022 Jul 12]. p. 2022.02.14.22270780. Available from: 10.1101/2022.02.14.22270780v1 PMC10914347 36702997 · DOI

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Authors
Jung, B., Ahn, K., Justice, C., Norman, L., Price, J., Sudre, G., & Shaw, P.
Affiliations
National Institutes of Health (US)
Corresponding author
Shaw, Philip
Venue
Molecular Psychiatry
Published
2022-12-14
Volume
28
Issue
3
Pages
1240-1247
ISSN
  • 1359-4184 (ISSN-L)
  • 1476-5578
OpenAlex
W4311358735
Cited by
10
References
71
Citations by year
2026: 3 · 2025: 3 · 2024: 2 · 2023: 2
FWCI
1.14
Type
journal article
Language
en
Open access
Locations
  • Molecular Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Research Portal (King's College London) (submittedVersion)
Funders
  • U.S. Department of Health & Human Services | NIH | National Human Genome Research Institute (ZIAHG200378)
  • U.S. Department of Health & Human Services | NIH | National Institute of Mental Health (ZIAHG200378)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Attention Deficit Hyperactivity Disorder
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
Keywords
attention deficit hyperactivity disorder, copy number variation, sex differences, rare variants, polygenic risk, childhood ADHD, Adolescent Brain Cognitive Development Study
MeSH terms
Adolescent, Attention Deficit Disorder with Hyperactivity, Brain, Child, Female, Humans, Male, Genetic Predisposition to Disease, Racial Groups, DNA Copy Number Variations

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