Cited by 85Autism Spectrum Disorder ResearchEpilepsy research and treatmentPharmacological Effects and Toxicity Studies

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Autism and epilepsy: A population-based nationwide cohort study

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Abstract

OBJECTIVE: To investigate the risk of autism spectrum disorder (ASD) in individuals with epilepsy and in their first-degree relatives to determine shared etiology. METHODS: Through the Swedish Patient Register, we identified 85,201 individuals with epilepsy, as well as all their siblings (n = 80,511) and offspring (n = 98,534). Each individual with epilepsy was compared with 5 controls, matched for age, sex, calendar period, and county, while siblings and offspring were compared with siblings and offspring of controls. We excluded siblings and offspring with epilepsy. Using Cox regression, we calculated hazard ratios (HRs) for future diagnosis of ASD. Logistic regression was applied to calculate odds ratios (ORs) for prior diagnosis of ASD. RESULTS: During follow-up, 1,381 (1.6%) individuals with epilepsy and 700 (0.2%) controls were diagnosed with ASD. Individuals with epilepsy were therefore at increased risk of future ASD (HR 10.49, 95% confidence interval [CI] 9.55-11.53), with the highest risk seen in individuals diagnosed with epilepsy in childhood. Both siblings (HR 1.62, 95% CI 1.43-1.83) and offspring (HR 1.64, 95% CI 1.46-1.84) of epilepsy patients were at increased risk of ASD. The risk in the offspring was particularly high in mothers with epilepsy (HR 1.91; 95% CI 1.63-2.23). Epilepsy was also associated with a prior diagnosis of ASD (OR 4.56, 95% CI 4.02-5.18). CONCLUSIONS: Individuals with epilepsy are at increased risk of ASD, especially if epilepsy appears in childhood. Further, ASD is more common in the siblings and offspring of individuals with epilepsy, suggesting shared etiology.

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Metadata

Authors
Sundelin, H. E. K., Larsson, H., Lichtenstein, P., Almqvist, C., Hultman, C. M., Tomson, T., & Ludvigsson, J. F.
Affiliations
Karolinska University Hospital (SE)
Venue
Neurology
Published
2016-07-12
Volume
87
Issue
2
Pages
192-197
ISSN
  • 0028-3878 (ISSN-L)
  • 1526-632X
OpenAlex
W2420966984
Cited by
85
References
0
Citations by year
2026: 5 · 2025: 7 · 2024: 6 · 2023: 6 · 2022: 3 · 2021: 9 · 2020: 12 · 2019: 11 · 2018: 5 · 2017: 13 · 2016: 7
FWCI
7.64
Type
journal article
Language
en
Open access
Locations
  • Neurology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Eli Lilly and Company
  • Eisai
  • Karolinska Institutet
  • Stockholms Läns Landsting (340‐2013‐5867)
  • Vetenskapsrådet (340–2013-5867, (2014-3831), 2011-02492)
  • Forskningsrådet om Hälsa, Arbetsliv och Välfärd (2012‐1678, 2011-2492, 340‐2013‐5867)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Health Sciences › Medicine › Clinical Neurology › Epilepsy research and treatment
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Pharmacological Effects and Toxicity Studies
Keywords
autism spectrum disorder, epilepsy, shared etiology, familial risk, siblings, offspring, maternal epilepsy, childhood-onset epilepsy, comorbidities
MeSH terms
Autism Spectrum Disorder, Adolescent, Adult, Aged, Aged, 80 and over, Child, Child, Preschool, Epilepsy, Family, Female, Follow-Up Studies, Humans, Infant, Infant, Newborn, Male, Middle Aged, Registries, Risk, Sweden, Genetic Predisposition to Disease, Young Adult

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