Age of walking and intellectual ability in autism spectrum disorder and other neurodevelopmental disorders: a population-based study / Alexandra HAVDAHL in Journal of Child Psychology and Psychiatry, 62-9 (September 2021)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 62-9 (September 2021) . - p.1070-1078 Titre : Age of walking and intellectual ability in autism spectrum disorder and other neurodevelopmental disorders: a population-based study Type de document : texte imprimé Auteurs : Alexandra HAVDAHL, Auteur ; Cristan FARMER, Auteur ; Synnve SCHJØLBERG, Auteur ; Anne-Siri ØYEN, Auteur ; PÃ¥l SUREN, Auteur ; Ted REICHBORN-KJENNERUD, Auteur ; Per MAGNUS, Auteur ; Michaeline BRESNAHAN, Auteur ; Mady HORNIG, Auteur ; Ezra SUSSER, Auteur ; W. Ian LIPKIN, Auteur ; Catherine LORD, Auteur ; Camilla STOLTENBERG, Auteur ; Audrey THURM, Auteur ; Somer L. BISHOP, Auteur Article en page(s) : p.1070-1078 Langues : Anglais (eng) Mots-clés : Autism Spectrum Disorder/epidemiology  Child  Cohort Studies  Humans  Intellectual Disability/epidemiology  Neurodevelopmental Disorders/epidemiology  Walking  Intellectual disability  MoBa  epidemiology  gross motor milestones  late walking  All profits from their research are donated to charity. The other authors report no  conflicts of interest. Index. décimale : PER Périodiques Résumé : BACKGROUND: Delayed walking is common in intellectual disability (ID) but may be less common when ID occurs with autism spectrum disorder (ASD). Previous studies examining this were limited by reliance on clinical samples and exclusion of children with severe motor deficits. OBJECTIVE: To examine in a population-based sample if age of walking is differentially related to intellectual ability in children with ASD versus other neurodevelopmental disorders (NDD). METHODS: Participants were from the nested Autism Birth Cohort Study of the Norwegian Mother, Father and Child Cohort Study (MoBa). Cox proportional hazards regression assessed if diagnosis (ASD n = 212 vs. NDD n = 354), continuous nonverbal IQ, and their interaction, were associated with continuous age of walking. RESULTS: The relationship between nonverbal IQ and age of walking was stronger for NDD than for ASD (Group × nonverbal IQ interaction, χ(2)  = 13.93, p = .0002). This interaction was characterized by a 21% decrease in the likelihood of walking onset at any given time during the observation period per 10-point decrease in nonverbal IQ (hazard ratio = 0.79, 95% CI: 0.78-0.85) in the NDD group compared to 8% (hazard ratio = 0.92, 95% CI: 0.86-0.98) in the ASD group. CONCLUSIONS: The finding that age of walking is less strongly related to low intellectual ability in children with ASD than in children without other NDDs supports the hypothesis that ID in ASD may result from heterogeneous developmental pathways. Late walking may be a useful stratification variable in etiological research focused on ASD and other NDDs. En ligne : http://dx.doi.org/10.1111/jcpp.13369 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=456 [article] Age of walking and intellectual ability in autism spectrum disorder and other neurodevelopmental disorders: a population-based study [texte imprimé] / Alexandra HAVDAHL, Auteur ; Cristan FARMER, Auteur ; Synnve SCHJØLBERG, Auteur ; Anne-Siri ØYEN, Auteur ; PÃ¥l SUREN, Auteur ; Ted REICHBORN-KJENNERUD, Auteur ; Per MAGNUS, Auteur ; Michaeline BRESNAHAN, Auteur ; Mady HORNIG, Auteur ; Ezra SUSSER, Auteur ; W. Ian LIPKIN, Auteur ; Catherine LORD, Auteur ; Camilla STOLTENBERG, Auteur ; Audrey THURM, Auteur ; Somer L. BISHOP, Auteur . - p.1070-1078. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 62-9 (September 2021) . - p.1070-1078 Mots-clés : Autism Spectrum Disorder/epidemiology  Child  Cohort Studies  Humans  Intellectual Disability/epidemiology  Neurodevelopmental Disorders/epidemiology  Walking  Intellectual disability  MoBa  epidemiology  gross motor milestones  late walking  All profits from their research are donated to charity. The other authors report no  conflicts of interest. Index. décimale : PER Périodiques Résumé : BACKGROUND: Delayed walking is common in intellectual disability (ID) but may be less common when ID occurs with autism spectrum disorder (ASD). Previous studies examining this were limited by reliance on clinical samples and exclusion of children with severe motor deficits. OBJECTIVE: To examine in a population-based sample if age of walking is differentially related to intellectual ability in children with ASD versus other neurodevelopmental disorders (NDD). METHODS: Participants were from the nested Autism Birth Cohort Study of the Norwegian Mother, Father and Child Cohort Study (MoBa). Cox proportional hazards regression assessed if diagnosis (ASD n = 212 vs. NDD n = 354), continuous nonverbal IQ, and their interaction, were associated with continuous age of walking. RESULTS: The relationship between nonverbal IQ and age of walking was stronger for NDD than for ASD (Group × nonverbal IQ interaction, χ(2)  = 13.93, p = .0002). This interaction was characterized by a 21% decrease in the likelihood of walking onset at any given time during the observation period per 10-point decrease in nonverbal IQ (hazard ratio = 0.79, 95% CI: 0.78-0.85) in the NDD group compared to 8% (hazard ratio = 0.92, 95% CI: 0.86-0.98) in the ASD group. CONCLUSIONS: The finding that age of walking is less strongly related to low intellectual ability in children with ASD than in children without other NDDs supports the hypothesis that ID in ASD may result from heterogeneous developmental pathways. Late walking may be a useful stratification variable in etiological research focused on ASD and other NDDs. En ligne : http://dx.doi.org/10.1111/jcpp.13369 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=456

Aggression in children with autism spectrum disorders and a clinic-referred comparison group / Cristan FARMER in Autism, 19-3 (April 2015)  

Public ISBD [article]  inAutism > 19-3 (April 2015) . - p.281-291 Titre : Aggression in children with autism spectrum disorders and a clinic-referred comparison group Type de document : texte imprimé Auteurs : Cristan FARMER, Auteur ; Eric BUTTER, Auteur ; Micah O. MAZUREK, Auteur ; Charles COWAN, Auteur ; Janet E. LAINHART, Auteur ; Edwin H. Jr COOK, Auteur ; Mary Beth DEWITT, Auteur ; Michael G. AMAN, Auteur Article en page(s) : p.281-291 Langues : Anglais (eng) Mots-clés : aggression  autism spectrum disorders  Child Behavior Checklist  Children’s Scale for Hostility and Aggression: Reactive/Proactive  proactive aggression  reactive aggression Index. décimale : PER Périodiques Résumé : A gap exists in the literature regarding aggression in autism spectrum disorders and how this behavior compares to other groups. In this multisite study, the Children’s Scale for Hostility and Aggression: Reactive/Proactive and the Aggression subscale of the Child Behavior Checklist were rated for 414 children with autism spectrum disorder (autistic disorder, 69%; pervasive developmental disorder not otherwise specified, 24%; Asperger’s disorder, 7%) and 243 clinic-referred children without autism spectrum disorder, aged 1–21 years (mean age about 7 years). Participants were not selected for aggressive behavior. Relative to the comparison group, children with autism spectrum disorder were reported to have less aggression and were more likely to be rated as reactive rather than proactive. Among all subjects, sex was not associated with aggression; higher IQ/adaptive behavior and older age were associated with more sophisticated types of aggression, while lower scores on IQ, adaptive behavior, and communication measures were associated with more physical aggression. The interaction between demographic variables and diagnosis was significant only for age: younger but not older children with autism spectrum disorder showed less aggression than clinic-referred controls. En ligne : http://dx.doi.org/10.1177/1362361313518995 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=257 [article] Aggression in children with autism spectrum disorders and a clinic-referred comparison group [texte imprimé] / Cristan FARMER, Auteur ; Eric BUTTER, Auteur ; Micah O. MAZUREK, Auteur ; Charles COWAN, Auteur ; Janet E. LAINHART, Auteur ; Edwin H. Jr COOK, Auteur ; Mary Beth DEWITT, Auteur ; Michael G. AMAN, Auteur . - p.281-291. Langues : Anglais (eng) in Autism > 19-3 (April 2015) . - p.281-291 Mots-clés : aggression  autism spectrum disorders  Child Behavior Checklist  Children’s Scale for Hostility and Aggression: Reactive/Proactive  proactive aggression  reactive aggression Index. décimale : PER Périodiques Résumé : A gap exists in the literature regarding aggression in autism spectrum disorders and how this behavior compares to other groups. In this multisite study, the Children’s Scale for Hostility and Aggression: Reactive/Proactive and the Aggression subscale of the Child Behavior Checklist were rated for 414 children with autism spectrum disorder (autistic disorder, 69%; pervasive developmental disorder not otherwise specified, 24%; Asperger’s disorder, 7%) and 243 clinic-referred children without autism spectrum disorder, aged 1–21 years (mean age about 7 years). Participants were not selected for aggressive behavior. Relative to the comparison group, children with autism spectrum disorder were reported to have less aggression and were more likely to be rated as reactive rather than proactive. Among all subjects, sex was not associated with aggression; higher IQ/adaptive behavior and older age were associated with more sophisticated types of aggression, while lower scores on IQ, adaptive behavior, and communication measures were associated with more physical aggression. The interaction between demographic variables and diagnosis was significant only for age: younger but not older children with autism spectrum disorder showed less aggression than clinic-referred controls. En ligne : http://dx.doi.org/10.1177/1362361313518995 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=257

Aggressive behavior in a sample of children with autism spectrum disorders / Cristan FARMER in Research in Autism Spectrum Disorders, 5-1 (January-March 2011)  

Public ISBD [article]  inResearch in Autism Spectrum Disorders > 5-1 (January-March 2011) . - p.317-323 Titre : Aggressive behavior in a sample of children with autism spectrum disorders Type de document : texte imprimé Auteurs : Cristan FARMER, Auteur ; Michael G. AMAN, Auteur Année de publication : 2011 Article en page(s) : p.317-323 Langues : Anglais (eng) Mots-clés : Autism spectrum-disorders Aggression Challenging-behavior Aggressive-subtypes Index. décimale : PER Périodiques Résumé : Little is known about the manifestation of aggressive behavior in children with autism, although it is commonly cited as a significant problem. Existing reports in autism do not emphasize subtypes of aggression, whereas distinguishing forms of aggression is commonplace in the typically developing literature. This study compared a sample of 121 children aged 3–20 years with autism spectrum disorders (ASD) to 244 children with other intellectual and developmental disabilities (IDD; age 4–21 years). Item- and subscale-level data from the Children's Scale for Hostility and Aggression: Reactive/Proactive (C-SHARP) were reported. Children with ASDs received higher ratings than those with IDD on several subscales tapping physical and reactive aggression. Within the ASD group, children with Asperger's disorder were rated significantly higher than children with autism on subscales tapping covert and verbal behaviors. Results indicate that at least some types of aggression were more common in children with ASDs than those with IDDs. En ligne : http://dx.doi.org/10.1016/j.rasd.2010.04.014 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=111 [article] Aggressive behavior in a sample of children with autism spectrum disorders [texte imprimé] / Cristan FARMER, Auteur ; Michael G. AMAN, Auteur . - 2011 . - p.317-323. Langues : Anglais (eng) in Research in Autism Spectrum Disorders > 5-1 (January-March 2011) . - p.317-323 Mots-clés : Autism spectrum-disorders Aggression Challenging-behavior Aggressive-subtypes Index. décimale : PER Périodiques Résumé : Little is known about the manifestation of aggressive behavior in children with autism, although it is commonly cited as a significant problem. Existing reports in autism do not emphasize subtypes of aggression, whereas distinguishing forms of aggression is commonplace in the typically developing literature. This study compared a sample of 121 children aged 3–20 years with autism spectrum disorders (ASD) to 244 children with other intellectual and developmental disabilities (IDD; age 4–21 years). Item- and subscale-level data from the Children's Scale for Hostility and Aggression: Reactive/Proactive (C-SHARP) were reported. Children with ASDs received higher ratings than those with IDD on several subscales tapping physical and reactive aggression. Within the ASD group, children with Asperger's disorder were rated significantly higher than children with autism on subscales tapping covert and verbal behaviors. Results indicate that at least some types of aggression were more common in children with ASDs than those with IDDs. En ligne : http://dx.doi.org/10.1016/j.rasd.2010.04.014 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=111

Attainment and loss of early social-communication skills across neurodevelopmental conditions in the Norwegian Mother, Father and Child Cohort Study / Alexandra HAVDAHL in Journal of Child Psychology and Psychiatry, 65-5 (May 2024)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 65-5 (May 2024) . - p.610-619 Titre : Attainment and loss of early social-communication skills across neurodevelopmental conditions in the Norwegian Mother, Father and Child Cohort Study Type de document : texte imprimé Auteurs : Alexandra HAVDAHL, Auteur ; Cristan FARMER, Auteur ; PÃ¥l SUREN, Auteur ; Anne-Siri ØYEN, Auteur ; Per MAGNUS, Auteur ; Ezra SUSSER, Auteur ; W. Ian LIPKIN, Auteur ; Ted REICHBORN-KJENNERUD, Auteur ; Camilla STOLTENBERG, Auteur ; Somer L. BISHOP, Auteur ; Audrey THURM, Auteur Article en page(s) : p.610-619 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : Background Delays and loss of early-emerging social-communication skills are often discussed as unique to autism. However, most studies of regression have relied on retrospective recall and clinical samples. Here, we examine attainment and loss of social-communication skills in the population-based Norwegian Mother, Father and Child Cohort Study (MoBa). Methods Mothers rated their child's attainment of 10 early-emerging social-communication skills at ages 18 and 36 months (N = 40,613, 50.9% male). Prospectively reported loss was defined as skill presence at 18 months but absence at 36 months. At 36 months, mothers also recalled whether the child had lost social-communication skills. The Norwegian Patient Registry was used to capture diagnoses of Autism Spectrum Disorder (autism) and other neurodevelopmental disabilities (NDDs). Results Delay in at least one skill was observed in 14% of the sample and loss in 5.4%. Recalled loss of social-communication skills was rare (0.86%) and showed low convergence with prospectively reported loss. Delay and especially loss were associated with elevated odds of an autism diagnosis (n = 383) versus no autism diagnosis (n = 40,230; 3 skills delayed: OR = 7.09[4.15,12.11]; 3 skills lost: OR = 30.66[17.30,54.33]). They were also associated with an increased likelihood of autism compared to some other NDDs. Delay (relative risk [RR] = 4.16[2.08, 8.33]) and loss (RR = 10.00[3.70, 25.00]) associated with increased likelihood of autism versus ADHD, and loss (RR = 4.35[1.28,14.29]), but not delay (RR = 2.00[0.78,5.26]), associated with increased likelihood of autism compared to language disability. Conversely, delay conferred decreased likelihood of autism versus intellectual disability (RR = 0.11[0.06,0.21]), and loss was not reliably associated with likelihood of autism versus intellectual disability (RR = 1.89[0.44,8.33]). Conclusions This population-based study suggests that loss of early social communication skills is more common than studies using retrospective reports have indicated and is observed across several NDD diagnoses (not just autism). Nevertheless, most children with NDD diagnoses showed no reported delay or loss in these prospectively measured skills. En ligne : https://doi.org/10.1111/jcpp.13792 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=526 [article] Attainment and loss of early social-communication skills across neurodevelopmental conditions in the Norwegian Mother, Father and Child Cohort Study [texte imprimé] / Alexandra HAVDAHL, Auteur ; Cristan FARMER, Auteur ; PÃ¥l SUREN, Auteur ; Anne-Siri ØYEN, Auteur ; Per MAGNUS, Auteur ; Ezra SUSSER, Auteur ; W. Ian LIPKIN, Auteur ; Ted REICHBORN-KJENNERUD, Auteur ; Camilla STOLTENBERG, Auteur ; Somer L. BISHOP, Auteur ; Audrey THURM, Auteur . - p.610-619. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 65-5 (May 2024) . - p.610-619 Index. décimale : PER Périodiques Résumé : Background Delays and loss of early-emerging social-communication skills are often discussed as unique to autism. However, most studies of regression have relied on retrospective recall and clinical samples. Here, we examine attainment and loss of social-communication skills in the population-based Norwegian Mother, Father and Child Cohort Study (MoBa). Methods Mothers rated their child's attainment of 10 early-emerging social-communication skills at ages 18 and 36 months (N = 40,613, 50.9% male). Prospectively reported loss was defined as skill presence at 18 months but absence at 36 months. At 36 months, mothers also recalled whether the child had lost social-communication skills. The Norwegian Patient Registry was used to capture diagnoses of Autism Spectrum Disorder (autism) and other neurodevelopmental disabilities (NDDs). Results Delay in at least one skill was observed in 14% of the sample and loss in 5.4%. Recalled loss of social-communication skills was rare (0.86%) and showed low convergence with prospectively reported loss. Delay and especially loss were associated with elevated odds of an autism diagnosis (n = 383) versus no autism diagnosis (n = 40,230; 3 skills delayed: OR = 7.09[4.15,12.11]; 3 skills lost: OR = 30.66[17.30,54.33]). They were also associated with an increased likelihood of autism compared to some other NDDs. Delay (relative risk [RR] = 4.16[2.08, 8.33]) and loss (RR = 10.00[3.70, 25.00]) associated with increased likelihood of autism versus ADHD, and loss (RR = 4.35[1.28,14.29]), but not delay (RR = 2.00[0.78,5.26]), associated with increased likelihood of autism compared to language disability. Conversely, delay conferred decreased likelihood of autism versus intellectual disability (RR = 0.11[0.06,0.21]), and loss was not reliably associated with likelihood of autism versus intellectual disability (RR = 1.89[0.44,8.33]). Conclusions This population-based study suggests that loss of early social communication skills is more common than studies using retrospective reports have indicated and is observed across several NDD diagnoses (not just autism). Nevertheless, most children with NDD diagnoses showed no reported delay or loss in these prospectively measured skills. En ligne : https://doi.org/10.1111/jcpp.13792 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=526

Characterization of autism spectrum disorder and neurodevelopmental profiles in youth with XYY syndrome / Lisa JOSEPH in Journal of Neurodevelopmental Disorders, 10-1 (December 2018)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 10-1 (December 2018) . - 30 p. Titre : Characterization of autism spectrum disorder and neurodevelopmental profiles in youth with XYY syndrome Type de document : texte imprimé Auteurs : Lisa JOSEPH, Auteur ; Cristan FARMER, Auteur ; Colby CHLEBOWSKI, Auteur ; Laura HENRY, Auteur ; Ari FISH, Auteur ; Catherine MANKIW, Auteur ; Anastasia XENOPHONTOS, Auteur ; Liv S. CLASEN, Auteur ; Bethany SAULS, Auteur ; Jakob SEIDLITZ, Auteur ; Jonathan D. BLUMENTHAL, Auteur ; Erin TORRES, Auteur ; Audrey THURM, Auteur ; Armin RAZNAHAN, Auteur Année de publication : 2018 Article en page(s) : 30 p. Langues : Anglais (eng) Mots-clés : Adaptive behavior  Autism spectrum disorder symptoms  Cognitive functioning  Learning disabilities  Sex chromosome aneuploidies Index. décimale : PER Périodiques Résumé : BACKGROUND: XYY syndrome is a sex chromosome aneuploidy that occurs in ~ 1/850 male births and is associated with increased risk for neurodevelopmental difficulties. However, the profile of neurodevelopmental impairments, including symptoms of autism spectrum disorder (ASD) in XYY remains poorly understood. This gap in knowledge has persisted in part due to lack of access to patient cohorts with dense and homogeneous phenotypic data. METHODS: We evaluated a single-center cohort of 64 individuals with XYY aged 5-25 years, using a standardized battery of cognitive and behavioral assessments spanning developmental milestones, IQ, adaptive behavior, academic achievement, behavioral problems, and gold-standard diagnostic instruments for ASD. Our goals were to (i) detail the neurodevelopmental profile of XYY with a focus on ASD diagnostic rates and symptom profiles, (ii) screen phenotypes for potential ascertainment bias effects by contrasting pre- vs. postnatally diagnosed XYY subgroups, and (iii) define major modules of phenotypic variation using graph-theoretical analysis. RESULTS: Although there was marked inter-individual variability, the average profile was characterized by some degree of developmental delay, and decreased IQ and adaptive behavior. Impairments were most pronounced for language and socio-communicative functioning. The rate of ASD was 14%, and these individuals exhibited autism symptom profiles resembling those observed in ASD without XYY. Most neurodevelopmental dimensions showed milder impairment among pre- vs. postnatally diagnosed individuals, with clinically meaningful differences in verbal IQ. Feature network analysis revealed three reliably separable modules comprising (i) cognition and academic achievement, (ii) broad domain psychopathology and adaptive behavior, and (iii) ASD-related features. CONCLUSIONS: By adding granularity to our understanding of neurodevelopmental difficulties in XYY, these findings assist targeted clinical assessment of newly identified cases, motivate greater provision of specialized multidisciplinary support, and inform future efforts to integrate behavioral phenotypes in XYY with neurobiology. TRIAL REGISTRATIONS: ClinicalTrials.gov NCT00001246 , "89-M-0006: Brain Imaging of Childhood Onset Psychiatric Disorders, Endocrine Disorders and Healthy Controls." En ligne : http://dx.doi.org/10.1186/s11689-018-9248-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=386 [article] Characterization of autism spectrum disorder and neurodevelopmental profiles in youth with XYY syndrome [texte imprimé] / Lisa JOSEPH, Auteur ; Cristan FARMER, Auteur ; Colby CHLEBOWSKI, Auteur ; Laura HENRY, Auteur ; Ari FISH, Auteur ; Catherine MANKIW, Auteur ; Anastasia XENOPHONTOS, Auteur ; Liv S. CLASEN, Auteur ; Bethany SAULS, Auteur ; Jakob SEIDLITZ, Auteur ; Jonathan D. BLUMENTHAL, Auteur ; Erin TORRES, Auteur ; Audrey THURM, Auteur ; Armin RAZNAHAN, Auteur . - 2018 . - 30 p. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 10-1 (December 2018) . - 30 p. Mots-clés : Adaptive behavior  Autism spectrum disorder symptoms  Cognitive functioning  Learning disabilities  Sex chromosome aneuploidies Index. décimale : PER Périodiques Résumé : BACKGROUND: XYY syndrome is a sex chromosome aneuploidy that occurs in ~ 1/850 male births and is associated with increased risk for neurodevelopmental difficulties. However, the profile of neurodevelopmental impairments, including symptoms of autism spectrum disorder (ASD) in XYY remains poorly understood. This gap in knowledge has persisted in part due to lack of access to patient cohorts with dense and homogeneous phenotypic data. METHODS: We evaluated a single-center cohort of 64 individuals with XYY aged 5-25 years, using a standardized battery of cognitive and behavioral assessments spanning developmental milestones, IQ, adaptive behavior, academic achievement, behavioral problems, and gold-standard diagnostic instruments for ASD. Our goals were to (i) detail the neurodevelopmental profile of XYY with a focus on ASD diagnostic rates and symptom profiles, (ii) screen phenotypes for potential ascertainment bias effects by contrasting pre- vs. postnatally diagnosed XYY subgroups, and (iii) define major modules of phenotypic variation using graph-theoretical analysis. RESULTS: Although there was marked inter-individual variability, the average profile was characterized by some degree of developmental delay, and decreased IQ and adaptive behavior. Impairments were most pronounced for language and socio-communicative functioning. The rate of ASD was 14%, and these individuals exhibited autism symptom profiles resembling those observed in ASD without XYY. Most neurodevelopmental dimensions showed milder impairment among pre- vs. postnatally diagnosed individuals, with clinically meaningful differences in verbal IQ. Feature network analysis revealed three reliably separable modules comprising (i) cognition and academic achievement, (ii) broad domain psychopathology and adaptive behavior, and (iii) ASD-related features. CONCLUSIONS: By adding granularity to our understanding of neurodevelopmental difficulties in XYY, these findings assist targeted clinical assessment of newly identified cases, motivate greater provision of specialized multidisciplinary support, and inform future efforts to integrate behavioral phenotypes in XYY with neurobiology. TRIAL REGISTRATIONS: ClinicalTrials.gov NCT00001246 , "89-M-0006: Brain Imaging of Childhood Onset Psychiatric Disorders, Endocrine Disorders and Healthy Controls." En ligne : http://dx.doi.org/10.1186/s11689-018-9248-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=386

Classifying and characterizing the development of adaptive behavior in a naturalistic longitudinal study of young children with autism / Cristan FARMER in Journal of Neurodevelopmental Disorders, 10-1 (December 2018)  

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Commentary: Lingering questions about the Social Responsiveness Scale short form. A commentary on Sturm et al. (2017) / Aaron J. KAAT in Journal of Child Psychology and Psychiatry, 58-9 (September 2017)  

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Comparing ability and norm-referenced scores as clinical trial outcomes for neurodevelopmental disabilities: a simulation study / Cristan FARMER in Journal of Neurodevelopmental Disorders, 15 (2023)  

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Describing Function in ASD: Using the DSM-5 and Other Methods to Improve Precision / Vanessa H. BAL in Journal of Autism and Developmental Disorders, 47-9 (September 2017)  

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Development, behavior, and biomarker characterization of Smith-Lemli-Opitz syndrome: an update / Audrey THURM in Journal of Neurodevelopmental Disorders, 8-1 (December 2016)  

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Differences in sleep EEG coherence and spindle metrics in toddlers with and without receptive/expressive language delay: a prospective observational study / Xinyi HONG in Journal of Neurodevelopmental Disorders, 17 (2025)  

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Disentangling global and domain-level adaptive behavior trajectories among children with autism spectrum disorder / Cristan FARMER in Journal of Child Psychology and Psychiatry, 64-6 (June 2023)  

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Factor structure of the VABS-3 Comprehensive Parent/Caregiver form in autistic individuals: Poor fit of three-factor and unidimensional models / Ellen WILKINSON in Autism, 28-3 (March 2024)  

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Longitudinal study of symptom severity and language in minimally verbal children with autism / Audrey THURM in Journal of Child Psychology and Psychiatry, 56-1 (January 2015)  

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Making Research Possible: Barriers and Solutions For Those With ASD and ID / Audrey THURM in Journal of Autism and Developmental Disorders, 52-10 (October 2022)  

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