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Research Unit, Department of Child- and Adolescent Psychiatry, Aarhus University Hospital, Psychiatry, Palle Juul-Jensens Boulevard 175, Entrance K, 8200, Aarhus N, Denmark.
Published: November 2021
AI Article Synopsis
- The study examined factors that contribute to delays in autism spectrum disorder (ASD) diagnoses by comparing children's diagnostic timelines among those with early, delayed, or no ASD diagnosis among 893 assessed before age 8.
- Of the children studied, 39% initially showed no ASD, but 21% were later diagnosed, with factors like autism symptoms, prior diagnoses, cognitive ability, and socioeconomic status influencing delays.
- Key differences noted include ADOS scores, which for delayed ASD were between those with early and no ASD, and distinctions based on the presence of other developmental disorders and low parental education levels.
Article Abstract
This study aimed to investigate factors associated with a delayed autism spectrum (ASD) diagnosis when compared to children with either no or early ASD diagnosis. Among 893 children assessed for ASD before age 8, 39% had no ASD at baseline, of which 21% received a later ASD diagnosis. Autism symptoms, diagnostic history of other developmental disorders, cognitive ability, and socioeconomic factors were associated with delayed ASD. Autism Diagnostic Observation Schedule (ADOS) scores in delayed ASD fell between early and no ASD. Other developmental disorders, time and clinical trends like ADOS use and low parental education distinguished delayed and early ASD, whereas higher frequency of IQ < 70 at baseline and a diagnosis of emotional disorders during follow-up distinguished delayed and no ASD.
