Differentiating early sensory profiles in toddlers at elevated likelihood of autism and association with later clinical outcome and diagnosis

Author:

Riboldi Elena Maria1,Capelli Elena1,Cantiani Chiara1,Beretta Carolina1,Molteni Massimo1,Riva Valentina1ORCID

Affiliation:

1. Scientific Institute, IRCCS E. Medea, Bosisio Parini, Lecco, Italy

Abstract

Sensory features are included in the diagnostic criteria of autism spectrum disorder, and sensory responsiveness may produce “cascading effects” on later development. However, the relation between early sensory profiles and later skills has yet to be defined. This study aims to characterize sensory subgroups in 116 toddlers at elevated likelihood for autism spectrum disorder and test their association with later autistic traits and diagnosis. We used latent class analyses to assess individual differences across sensory patterns, grouping individuals with similar sensory profiles together. The final model was chosen based on a stepwise procedure, starting with a one-class solution, and then adds one class at a time. The Sensory Profile-2 Questionnaire measured clinical sensory features, and four sensory patterns were evaluated (seeking, avoiding, sensitivity, and registration). We investigated sensory subgroups concerning socio-communication skills and restricted/repetitive behaviors at 24 months and the clinical best-estimate diagnosis at 3 years. A three-class solution was favored, and toddlers can be characterized into three homogeneous sensory groups: low seeking, sensory balanced, and high sensitivity. The results showed that the high sensitivity group showed later socio-communicative difficulties and restricted/repetitive behaviors. Children in this class were those with the highest percentage of diagnosis at 3 years (57.9%). These findings provide new insights into the nature of sensory processing and may have implications for personalized support needs. Lay abstract Early sensory responsiveness may produce cascading effects on later development, but the relation between sensory profiles and autistic diagnosis remains unclear. In a longitudinal sample of toddlers at elevated likelihood for autism, we aimed to characterize sensory subgroups and their association with clinical outcomes later on. Three sensory subgroups were described and early sensory sensitivity plays a significant role in later development and diagnosis. This study supported the importance of examining different levels of sensory patterns to dissect the phenotypic heterogeneity in sensory processing. As sensory differences are associated with later developmental outcomes, these results may be critical when designing intervention needs and support for children at increased likelihood for neurodevelopmental disorders.

Funder

Fondazione Italiana per l’Autismo

Ministero della Salute

Publisher

SAGE Publications

Subject

Developmental and Educational Psychology

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