Global Autism Prevalence: 1 in 54 Children, Approximately 18 Million Worldwide
CDC ADDM Network (2020 data): 1 in 36 8-year-olds in US (up from 1 in 44 in 2018). Global estimates vary by methodology.
WHO (2023): ~1 in 100 children worldwide. With ~1.9 billion children (0–14), that implies ~19 million. Earlier calculation (792M/44 ≈ 18M) used 2018 US rate on global child population.
Prevalence rise reflects broader diagnostic criteria, increased awareness, screening, and possibly true increase. Disparities persist by race/ethnicity, geography, and access to services.
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