Development of the Social Motor Function Classification System for Children with Autism Spectrum Disorders: A...

Area of Science:

• Pediatric Rehabilitation
• Autism Spectrum Disorder Research
• Motor Function Assessment

Background:

• Autism Spectrum Disorder (ASD) often presents with social and motor challenges.
• Accurate assessment tools are crucial for targeted interventions in children with ASD.
• The Social Motor Function Classification System for Children with Autism Spectrum Disorders (SMFCS-ASD) is a novel classification system.

Purpose of the Study:

• To evaluate the inter-rater reliability and concurrent validity of the SMFCS-ASD.
• To determine if the SMFCS-ASD is a dependable measure for children with ASD.
• To compare SMFCS-ASD results with a standardized gross motor assessment.

Main Methods:

• Reliability was assessed using six physical therapists rating 25 children with ASD.
• Validity was examined by correlating SMFCS-ASD scores with the Gross Motor Scale (GMS) of the Peabody Developmental Motor Scales, 2nd Edition (PDMS-2) in 1001 children with ASD.
• Statistical analyses included Cohen's kappa and Intraclass Correlation Coefficient (ICC) for reliability, and Spearman's rho for validity.

Main Results:

• Reliability analyses showed moderate to substantial agreement among examiners (Cohen's κ ≤ 0.65, ICC > 0.90, p < 0.001).
• The SMFCS-ASD demonstrated significant positive correlations with the GMS of the PDMS-2 (rho ranging from 0.61 to 0.76, p < 0.001).

Conclusions:

• The SMFCS-ASD is a reliable tool for assessing social motor function in children with ASD.
• The system exhibits significant concurrent validity when compared to the PDMS-2 GMS.
• SMFCS-ASD provides a dependable and valid measure for clinical and research applications in ASD.