A report on the survey results, which comes from the nationally representative NHIS household survey, does not examine why there’s been an increase in developmental disabilities diagnoses. However, the statistics align with other research and data collected by the federal government.
A March report from CDC found 1 in 36 children age 8 were diagnosed with autism spectrum disorder in 2020. That included 4% of boys and 1% of girls. That ratio was at 1 in 150 two decades prior and narrowed to 1 in 44 in 2018.
