Developmental Patterns in Autism and Other Neurodevelopmental Disorders in Preschool Children.

Area of Science:

• Neurodevelopmental Disorders
• Child Psychology
• Developmental Pediatrics

Background:

• Neurodevelopmental disorders (NDDs) are a diverse group of conditions impacting social, cognitive, and emotional functioning from development through adulthood.
• These disorders present highly heterogeneous developmental trajectories.
• Understanding these trajectories is crucial for effective early intervention.

Purpose of the Study:

• To analyze and compare developmental and adaptive profiles of preschool-aged children diagnosed with different NDDs.
• To better characterize the developmental trajectories within various NDDs.
• To investigate the utility of specific assessment tools in differentiating NDDs.

Main Methods:

• Evaluated 196 preschool children (20-71 months) with NDDs: 108 with autism spectrum disorder (ASD), 52 with language disorder (LD), and 36 with mixed specific developmental disorder (MSDD).
• Utilized comprehensive neuropsychiatric evaluations with standardized tools (Griffiths-III, ADOS-2, VABS-II, ADI-R).
• Incorporated parent-completed questionnaires (DP-3, CBCL 1½-5) for functional assessment.

Main Results:

• All NDD groups exhibited psychomotor skill deficits, with ASD children showing the most significant impairment.
• ASD profiles were comparable to mixed specific developmental disorder (MSDD) in communication and motor domains.
• The Child Behavior Checklist (CBCL) pervasive developmental problem scale differentiated ASD, while DP-3 and VABS-II distinguished individual diagnostic groups.

Conclusions:

• Parental and caregiver perspectives are vital for accurately defining children's functional status in NDDs.
• The Developmental Profile-3 (DP-3) shows promise as a screening tool for various neurodevelopmental disorders.
• Differentiated assessment is key to understanding the heterogeneity of NDDs.