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- W3161863041 abstract "Language delay is one of the major referral criteria for an autism evaluation. Once an autism spectrum diagnosis is established, the language prognosis is among the main parental concerns. Early language regression (ELR) is observed by 10-50% of parents but its relevance to late language level and socio-communicative ability is uncertain. This study aimed to establish the predictive value of ELR on the progression of language development and socio-communicative outcomes to guide clinicians in addressing parents' concerns at the time of diagnosis.We used socio-communicative, language, and cognitive data of 2,047 autism spectrum participants from the Simons Simplex Collection, aged 4-18 years (mean = 9 years; SD = 3.6). Cox proportional hazard and logistic regression models were used to evaluate the effect of ELR on language milestones and the probability of using complex and flexible language, as defined by the choice of ADOS module at enrollment. Linear models were then used to evaluate the relationship of ELR and non-verbal IQ with socio-communicative and language levels.ELR is associated with earlier language milestones but delayed attainment of fluent, complex, and flexible language. However, this language outcome can be expected for almost all autistic children without intellectual disability at 18 years of age. It is mostly influenced by non-verbal IQ, not ELR. The language and socio-communicative level of participants with flexible language, as measured by the Vineland and ADOS socio-communicative subscales, was not affected by ELR.This study is based on a relatively coarse measure of ultimate language level and relies on retrospective reporting of early language milestones and ELR. It does not prospectively document the age at which language catches up, the relationship between ELR and other behavioral areas of regression, nor the effects of intervention.For autistic individuals with ELR and a normal level of non-verbal intelligence, language development follows a bayonet shape trajectory: early first words followed by regression, a plateau with limited progress, and then language catch up." @default.
- W3161863041 created "2021-05-24" @default.
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- W3161863041 date "2021-05-13" @default.
- W3161863041 modified "2023-10-01" @default.
- W3161863041 title "Bayonet-shaped language development in autism with regression: a retrospective study" @default.
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- W3161863041 doi "https://doi.org/10.1186/s13229-021-00444-8" @default.
- W3161863041 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8117564" @default.
- W3161863041 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33985558" @default.
- W3161863041 hasPublicationYear "2021" @default.
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