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Autism spectrum disorder (ASD) and attention deficit hyperactivity disorder (ADHD) are highly heritable neurodevelopmental disorders that frequently co-occur. Both rare and common genetic variants are important for ASD and ADHD risk but their combined contribution to clinical heterogeneity is unclear. In a sample of 39 ASD and/or ADHD families we estimated the overall variance explained by known rare copy number variants (CNVs) and polygenic risk score (PRS) from common variants to be 10% in comorbid ASD/ADHD, 4% in ASD and 2% in ADHD. We show that burden of large, rare CNVs and PRS is significantly higher in adult ASD and/or ADHD patients with sustained need for specialist care compared to their unaffected relatives, while affected relatives fall in-between the two.
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http://dx.doi.org/10.1007/s10803-020-04552-x | DOI Listing |
Sleep
September 2025
Department of Psychology, Royal Holloway, University of London, London, United Kingdom.
Study Objectives: Chronotype has been linked to a wide variety of psychiatric conditions. In particular, evening chronotype could be a transdiagnostic risk factor for different mental health difficulties. In this study we examine how chronotype relates to psychopathology and whether it can be conceptualised as part of the global construct of psychopathology (p-factor) by studying the genetic and environmental overlap between these variables.
View Article and Find Full Text PDFJ Popul Ther Clin Pharmacol
September 2024
Department of Biology, Howard University, Washington DC 20059, USA.
Developmental Dyslexia (DD) and Attention-deficit/hyperactivity disorder (ADHD) are neurodevelopmental disorders that often coexist and share complex genetic underpinnings. Our case study integrates psychological assessments and whole exome sequencing to explore the genetic basis of DD and ADHD co-occurrence in a single proband (a nine-year-old female born to healthy) from a consanguineous Pakistani family. We present a proband with symptoms of impulsivity, inattention, and severe hyperactive behavior, along with speech impairment and moderate learning disabilities.
View Article and Find Full Text PDFAlpha Psychiatry
August 2025
Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, 130021 Changchun, Jilin, China.
Background: The progressive legalization and widespread use of cannabis has led to its use as a treatment for certain neuropsychiatric disorders. Traditional epidemiological studies suggest that cannabis use has an effect on some neurocognitive aspects. However, it is unclear whether cannabis use is causally related to common neuropsychiatric disorders.
View Article and Find Full Text PDFThere has been limited research to date into contextual factors hindering or supporting the successful implementation of neuro-affirming practice in support for Autistic and otherwise neurodivergent adults. We used a Realist Evaluation approach to explore key contexts affecting neuro-affirming practice. A preliminary programme theory of key aspects of support was developed.
View Article and Find Full Text PDFBMC Pediatr
September 2025
School of Health and Welfare, Halmstad University, Halmstad, Sweden.
Background: Adequate sleep is crucial for children's health, especially for children with ADHD and concurrent sleep problems. There is a need for more studies focusing on sleep problems in children with ADHD as these problems may exacerbate ADHD symptoms and vice versa, impacting negatively on everyday life. The aim of this study was to investigate the differences in health-related factors between children with ADHD without clinically relevant sleep problems and those with clinically relevant sleep problems after a sleep intervention.
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