A recent survey by the National Center for Health Statistics, a part of the CDC, used a new methodology and concluded that the rate of children with an Autism Spectrum Disorder (ASD) is not 1 in 68, as previously reported, but 1 in 45. The 1 in 45 estimate was from data collected in 2014 from more than 11,000 parents.
The survey interviewed parents of children ages 3-17. The previous method, which resulted in the 1 in 68 ASD prevalence rate, used data collected from records from clinics and programs geared towards children with special needs, instead of interviewing parents directly.
The report states, “The revised question ordering and new approach to asking about developmental disabilities in the 2014 NHIS likely affected the prevalence estimates of these conditions.”