Rxivist combines preprints from bioRxiv with data from Twitter to help you find the papers being discussed in your field. Currently indexing 63,093 bioRxiv papers from 279,869 authors.
A genetic investigation of sex bias in the prevalence of attention deficit hyperactivity disorder
Raymond K Walters,
S. Hong Lee,
Preben Bo Mortensen,
Marianne Giørtz Pedersen,
David M Hougaard,
Stephen V. Faraone,
Michael C O’Donovan,
Anders D. Børglum,
Benjamin M Neale
Posted 23 Jun 2017
bioRxiv DOI: 10.1101/154088 (published DOI: 10.1016/j.biopsych.2017.11.026)
Posted 23 Jun 2017
Attention-deficit/hyperactivity disorder (ADHD) shows substantial heritability and is 2-7 times more common in males than females. We examined two putative genetic mechanisms underlying this sex bias: sex-specific heterogeneity and higher burden of risk in female cases. We analyzed genome-wide common variants from the Psychiatric Genomics Consortium and iPSYCH Project (20,183 cases, 35,191 controls) and Swedish population-registry data (N=77,905 cases, N=1,874,637 population controls). We find strong genetic correlation for ADHD across sex and no mean difference in polygenic burden across sex. In contrast, siblings of female probands are at an increased risk of ADHD, compared to siblings of male probands. The results also suggest that females with ADHD are at especially high risk of comorbid developmental conditions. Overall, this study supports a greater familial burden of risk in females with ADHD and some clinical and etiological heterogeneity. However, autosomal common variants largely do not explain the sex bias in ADHD prevalence.
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