Cited by 144Autism Spectrum Disorder ResearchGenetics and Neurodevelopmental DisordersFamily and Disability Support Research

Familial Recurrence of Autism Spectrum Disorder: Evaluating Genetic and Environmental Contributions

Risch, Neil, Hoffmann, Thomas J., Anderson, Meredith, Croen, Lisa A., Grether, Judith K., Windham, Gayle C.·2014·American Journal of Psychiatry

Abstract

OBJECTIVE: This study was designed to examine the pattern of familial recurrence of autism spectrum disorder (ASD) in terms of genetic and environmental contributions related to timing of birth. METHOD: The authors linked California Department of Developmental Services records with state birth certificates to identify all siblings and half siblings of individuals affected with ASD born between 1990 and 2003. A total of 6,616 full siblings, 644 maternal half siblings, and 299 paternal half siblings born after ASD index cases were used to calculate recurrence risks. Control families, identified through matching to cases, were included for comparison (a total of 29,384 siblings). RESULTS: The overall sibling recurrence risk was 10.1%, compared with a prevalence of 0.52% in siblings of controls. The recurrence risk in second-born children was higher (11.5%) than in later-born siblings (7.3%); a similar pattern was observed for maternal half siblings (6.5% for second-born compared with 3.0% for later-born siblings; 4.8% overall). The recurrence risk was significantly higher for siblings who immediately followed the index case in birth order compared with those later in birth order. The recurrence risk for paternal half siblings (2.3%) was half the overall recurrence risk for maternal half siblings but was similar to that for later-born maternal half siblings. An exponential effect of short interbirth interval was observed, with the recurrence risk reaching 14.4% for an interbirth interval of 18 months or less, compared with 6.8% for an interval of 4 years or more. An identical phenomenon was observed in maternal half siblings. CONCLUSIONS: The results support genetic susceptibility in the familial recurrence of ASD along with factors related to timing of birth.

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Crossref · 10.1176/appi.ajp.2014.13101359

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Authors
Risch, N., Hoffmann, T. J., Anderson, M., Croen, L. A., Grether, J. K., & Windham, G. C.
Affiliations
California Department of Public Health (US)
Venue
American Journal of Psychiatry
Published
2014-11-01
Volume
171
Issue
11
Pages
1206-1213
ISSN
  • 0002-953X (ISSN-L)
  • 1535-7228
OpenAlex
W2121766620
Cited by
144
References
33
Citations by year
2026: 3 · 2025: 5 · 2024: 12 · 2023: 14 · 2022: 14 · 2021: 10 · 2020: 13 · 2019: 10 · 2018: 14 · 2017: 17 · 2016: 13 · 2015: 17 · 2014: 2
FWCI
9.11
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Social Sciences › Psychology › Clinical Psychology › Family and Disability Support Research
Keywords
autism spectrum disorder, familial recurrence, recurrence risk, birth order, birth interval, half-siblings, full siblings, genetic susceptibility, environmental factors, birth timing
MeSH terms
Adolescent, Birth Certificates, Birth Order, California, Child, Child Development Disorders, Pervasive, Data Collection, Environmental Exposure, Female, Humans, Male, Maternal Behavior, Recurrence, Risk Factors, Prevalence, Logistic Models, Siblings, Young Adult

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