Cited by 378Autism Spectrum Disorder ResearchGenetics and Neurodevelopmental DisordersGenetic Associations and Epidemiology

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Concordance for the syndrome of autism in 40 pairs of afflicted twins

EDWARD R. RITVO, B. J. Freeman, ANNE MASON-BROTHERS, Amy Mo, Anne Ritvo·1985·American Journal of Psychiatry

DOI 10.1176/ajp.142.1.74

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Abstract

The UCLA Registry for Genetic Studies in Autism was established in 1980 to test the hypothesis that genetic factors may be etiologically significant in subsets of patients. To date 61 pairs of twins have enrolled and 40 meet research diagnostic criteria for autism. The authors found a concordance for autism in these 40 pairs of 95.7% in the monozygotic twins (22 of 23) and 23.5% in the dizygotic twins (four of 17).

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Authors: RITVO, E. R., Freeman, B. J., MASON-BROTHERS, A., Mo, A., & Ritvo, A.
Affiliations: University of California, Los Angeles (US)
Venue: American Journal of Psychiatry
Publisher: American Psychiatric Association Publishing
Published: 1985-01-01
Volume: 142
Issue: 1
Pages: 74-77
ISSN: 0002-953X (ISSN-L)
1535-7228
DOI: 10.1176/ajp.142.1.74
OpenAlex: W1717251174
Cited by: 378
References: 23
Citations by year: 2025: 1 · 2023: 3 · 2022: 3 · 2021: 4 · 2020: 5 · 2019: 5 · 2018: 6 · 2017: 6 · 2016: 15 · 2015: 14 · 2014: 15 · 2013: 13 · 2012: 22
FWCI: 9.59
Type: journal article
Language: en
Open access: closed
Locations: American Journal of Psychiatry (publishedVersion)
PubMed (publishedVersion)
Funders: National Institute of Mental Health (MH 31274, MH 30897)
Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD-04612)
Topics: Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
Keywords: autism spectrum disorder, twin concordance, monozygotic twins, dizygotic twins, genetic etiology, twin registry
MeSH terms: Adolescent, Adult, Age Factors, Autistic Disorder, Birth Order, Child, Child, Preschool, Diseases in Twins, Female, Humans, Male, Models, Genetic, Pregnancy, Registries, Sex Factors, Twins, Dizygotic, Twins, Monozygotic, United States

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Concordance for the syndrome of autism in 40 pairs of afflicted twins

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