Clinical signs associated with earlier diagnosis of children with autism Spectrum disorder

Nachum Sicherman, Jimmy Charite, Gil Eyal, Magdalena Janecka, George Loewenstein, Kiely Law, Paul H. Lipkin, Alison R. Marvin, Joseph D. Buxbaum

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Background: The objective of this study is to gain new insights into the relationship between clinical signs and age at diagnosis. Method: We utilize a new, large, online survey of 1743 parents of children diagnosed with ASD, and use multiple statistical approaches. These include regression analysis, factor analysis, and machine learning (regression tree). Results: We find that clinical signs that most strongly predict early diagnosis are not necessarily specific to autism, but rather those that initiate the process that eventually leads to an ASD diagnosis. Given the high correlations between symptoms, only a few signs are found to be important in predicting early diagnosis. For several clinical signs we find that their presence and intensity are positively correlated with delayed diagnosis (e.g., tantrums and aggression). Even though our data are drawn from parents’ retrospective accounts, we provide evidence that parental recall bias and/or hindsight bias did not play a significant role in shaping our results. Conclusion: In the subset of children without early deficits in communication, diagnosis is delayed, and this might be improved if more attention will be given to clinical signs that are not necessarily considered as ASD symptoms. Our findings also suggest that careful attention should be paid to children showing excessive tantrums or aggression, as these behaviors may interfere with an early ASD diagnoses.

Original languageEnglish
Article number96
JournalBMC Pediatrics
Issue number1
StatePublished - Dec 2021


  • Autism spectrum disorder
  • Clinical signs
  • Diagnosis age
  • Early diagnosis
  • Regression trees
  • Symptoms


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