A new, first-of-its-kind study shows the rate of profound autism is rising in the U.S., though those cases are a smaller share of all autism diagnoses
FILE - An autistic boy holds the hand of his adoptive father as they prepare to leave for a family outing from their home in Springfield, Mass., on Saturday, Dec. 12, 2015. Traditionally, autism was diagnosed only in kids with severe language and social impairments and unusual repetitious behaviors. But the definition gradually expanded, and autism is now shorthand for a group of milder, related conditions, too.
Though autism has been diagnosed for at least 80 years, the new study is the first to put a number on the share of U.S. children who have the most severe version of it. It comes less than two years after an international commission of autism experts established: children with an IQ of 50 or less, and/or kids who can't communicate through speaking.
The researchers looked at school and medical records from 2000 to 2016 for more than 20,000 8-year-olds identified as having autism spectrum disorders. The new research found a large racial gap in profound autism. Among Black children with autism, 37% had profound autism. The same was true for about one-third of Hispanic kids with autism and about one-fifth of white children with autism.
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