Diagnosed Developmental Disabilities in Children Aged 3-17 Years: United States, 2019-2021.

Developmental disabilities are common in children in the United States, and the prevalence has increased in recent years (1). Timely estimates are necessary to assess the adequacy of services and interventions that children with developmental disabilities typically need (2). This report provides updated prevalence estimates for diagnosed autism spectrum disorder, intellectual disability, and other developmental delay among children aged 3-17 years from the 2019-2021 National Health Interview Survey (NHIS), with differences in prevalence examined between years and by sex, age group, and race and Hispanic origin. Estimates are also presented for any developmental disability, defined as having had one or more of these three diagnoses.