Factors influencing the sensory profile in patients with autism spectrum disorder from 16 months to 14 years: results of an observational study

Introduction – Sensory processing abnormalities represent a high-impact clinical feature in individuals with Autism Spectrum Disorder (ASD). Sensory alterations can be classified by modality and behavioral responses to stimuli. The literature presents conflicting results regarding the association between the sensory profile and other clinical elements. Therefore, this study aimed to characterize the clinical variables that influence sensory anomalies in subjects with ASD. Methods – This single-center retrospective observational study selected 159 subjects with a confirmed ASD diagnosis, aged 16 months to 14 years. Data collected included clinical assessments (developmental profile, intelligence quotient, adaptive profile and autistic symptom severity) and sensory evaluations using the Sensory Profile-2. A Bayesian cumulative logit model was implemented to assess the impact of clinical variables on sensory profiles. Results – The analysis identifies adaptive functioning as the most consistent predictor of sensory outcomes, where higher functioning correlates with a reduction in atypical patterns, particularly sensory sensitivity. Conversely, autism severity and sex generally showed no significant impact, though higher cognitive functioning was specifically linked to increased sensory avoiding behaviors. Furthermore, the Bayesian analysis revealed a modifying effect of age on the sensory profile, characterized by a non-monotonic trend clustered around two distinct age peaks. The preschool period is characterized by a predominance of sensory seeking behaviors and auditory processing challenges, whereas the 8-to-12-year developmental window marks a significant shift toward hypersensitivity and avoidant patterns, particularly within the visual and oral modalities. Discussion – Overall, the analysis revealed that the adaptive profile has a significant impact on the sensory profile, consistent with existing literature. Age emerged as a key modifying factor with a non-monotonic trajectory, contrasting with previous studies that typically highlight either improvement or stability over time. Study main limitations include its retrospective and non-longitudinal nature. Therefore, further prospective longitudinal studies are necessary to explore these dynamic associations between the sensory profile and other clinical variables over time.