Cited by 178Genetics and Neurodevelopmental DisordersAutism Spectrum Disorder ResearchWilliams Syndrome Research

Autism spectrum disorder in fragile X syndrome: a longitudinal evaluation

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Hernandez, R. Nick, Feinberg, Rachel L., Vaurio, Rebecca, Passanante, Natalie M., Thompson, Richard E., Kaufmann, Walter E.·2009·American Journal of Medical Genetics Part A

Abstract

The present study extends our previous work on characterizing the autistic behavior profile of boys with fragile X syndrome (FXS) who meet Diagnostic and Statistical Manual for Mental Disorders, 4th Edition criteria for autism spectrum disorder (ASD) into a longitudinal evaluation of ASD in FXS (FXS + ASD). Specifically, we aimed to determine the stability of the diagnosis and profile of ASD in FXS over time. Through regression models, we also evaluated which autistic and social behaviors and skills were correlates of diagnosis and autistic behavior severity (i.e., Autism Diagnostic Interview‐Revised total scores). Finally, we assessed the evolution of cognitive parameters in FXS + ASD. A population of 56 boys (30–88 months at baseline) with FXS was evaluated using measures of autistic, social, and cognitive behaviors and skills at three yearly evaluations. We found that the diagnosis of ASD in FXS was relatively stable over time. Further emphasizing this stability, we found a set of behaviors and skills, particularly those related to peer relationships and adaptive socialization, that differentiated FXS + ASD from the rest of the FXS cohort (FXS + None) and contributed to autistic severity at all time points. Nevertheless, the general improvement in autistic behavior observed in FXS + ASD coupled with the concurrent worsening in FXS + None resulted in less differentiation between the groups over time. Surprisingly, FXS + ASD IQ scores were stable while FXS + None non‐verbal IQ scores declined. Our findings indicate that ASD is a distinctive subphenotype in FXS characterized by deficits in complex social interaction, with similarities to ASD in the general population. © 2009 Wiley‐Liss, Inc.

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Research works printed but not linked: 7

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Authors
Hernandez, R. N., Feinberg, R. L., Vaurio, R., Passanante, N. M., Thompson, R. E., & Kaufmann, W. E.
Affiliations
  • Kennedy Krieger Institute (US)
  • Johns Hopkins University (US)
Corresponding author
Kaufmann, Walter E.
Venue
American Journal of Medical Genetics Part A
Publisher
Wiley
Published
2009-05-13
Volume
149A
Issue
6
Pages
1125-1137
ISSN
  • 1552-4825 (ISSN-L)
  • 1552-4833
OpenAlex
W2162775240
Cited by
178
References
69
Citations by year
2026: 2 · 2025: 5 · 2024: 5 · 2023: 6 · 2022: 14 · 2021: 10 · 2020: 16 · 2019: 12 · 2018: 12 · 2017: 9 · 2016: 11 · 2015: 8 · 2014: 17 · 2013: 12 · 2012: 12
FWCI
7.31
Type
journal article
Language
en
Open access
Locations
  • American Journal of Medical Genetics Part A (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (n01hd033175-015)
  • National Institute of Mental Health (MH67092, R21MH067092)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (N01 HD033175)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Neuroscience › Developmental Neuroscience › Williams Syndrome Research
Keywords
fragile X syndrome, autism spectrum disorder, social interaction deficits, peer relationships, cognitive development, longitudinal development, boys
MeSH terms
Adaptation, Psychological, Autistic Disorder, Child, Child Behavior, Child Development Disorders, Pervasive, Child, Preschool, Fragile X Syndrome, Humans, Interpersonal Relations, Interview, Psychological, Language Disorders, Language Tests, Longitudinal Studies, Male, Reference Values, Regression Analysis, Severity of Illness Index, Social Behavior, Stanford-Binet Test, Cohort Studies

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