Age of walking and intellectual ability in autism spectrum disorder and other neurodevelopmental disorders: a population-based study / A. 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 et/ou numérique Auteurs : A. HAVDAHL, Auteur ; C. FARMER, Auteur ; Synnve SCHJØLBERG, Auteur ; A. S. ØYEN, Auteur ; P. SURÉN, Auteur ; T. REICHBORN-KJENNERUD, Auteur ; P. MAGNUS, Auteur ; Michaeline BRESNAHAN, Auteur ; M. HORNIG, Auteur ; E. SUSSER, Auteur ; W. I. LIPKIN, Auteur ; C. LORD, Auteur ; C. STOLTENBERG, Auteur ; A. 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, ?(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 et/ou numérique] / A. HAVDAHL, Auteur ; C. FARMER, Auteur ; Synnve SCHJØLBERG, Auteur ; A. S. ØYEN, Auteur ; P. SURÉN, Auteur ; T. REICHBORN-KJENNERUD, Auteur ; P. MAGNUS, Auteur ; Michaeline BRESNAHAN, Auteur ; M. HORNIG, Auteur ; E. SUSSER, Auteur ; W. I. LIPKIN, Auteur ; C. LORD, Auteur ; C. STOLTENBERG, Auteur ; A. 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, ?(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

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