Study Protocol: Analysis of Participation Patterns and Predictors for Brazilian Children and Adolescents With Autism Spectrum Disorder—Participa TEA

PURPOSE: This study aims to investigate participation levels, predictors, and environmental factors that influence the participation of Brazilian children and adolescents with Autism Spectrum Disorder (ASD) in recreational and community activities. It also explores barriers, facilitators, and family strategies to promote participation. METHODS: A cross-sectional study will include 500 children and adolescents with ASD from Brazil's five regions. Using a Patient and Public Involvement approach, families collaborate in research decisions. Data will be collected through validated instruments: Children's Assessment of Participation and Enjoyment, Preferences for Activities of Children, Participation and Environment Measure-Children and Youth, and the mobility domain of Pediatric Evaluation of Disability Inventory-Computer Adaptive Test. A multimode data collection approach, combining online and in-person data collection, will be applied. Analyses will include descriptive statistics and linear regression. RESULTS: The study will describe participation patterns, preferences, barriers, facilitators, and predictors such as mobility and socioeconomic factors. CONCLUSION: Results will provide evidence to inform public policies and develop culturally relevant interventions that enhance participation, inclusion, and quality of life for Brazilian children with ASD.