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04-02-2019 | OriginalPaper | Uitgave 6/2019 Open Access

Journal of Autism and Developmental Disorders 6/2019

Autism With and Without Regression: A Two-Year Prospective Longitudinal Study in Two Population-Derived Swedish Cohorts

Tijdschrift:
Journal of Autism and Developmental Disorders > Uitgave 6/2019
Auteurs:
Lucy Thompson, Christopher Gillberg, Sara Landberg, Anne-Katrin Kantzer, Carmela Miniscalco, Martina Barnevik Olsson, Mats A. Eriksson, Elisabeth Fernell
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Lucy Thompson and Christopher Gillberg are joint first authors.

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Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Abstract

Two community-based cohorts of children with autism spectrum disorder, examined using similar assessment protocols, were pooled (n = 301) and subdivided according to history of regression. Those with regression (n = 62), 20.5% of the combined cohort, were contrasted with those without regression (n = 241) at first assessment (age range 19–60 months) and at 2-year follow-up on a range of measures. The regression group was significantly more functionally impaired, with regard to intellectual function (p < .001), language development (p < .001), and to severity of autism (p < .01) at both T1 and T2. Only 14 (23.3%) had a clearly identified underlying etiology [24 (18.6%) in the non-regressive group]. There were no significant differences between those who had regressed ‘from normal’ and those who had regressed ‘from low’ functioning.

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