Autism without intellectual impairments more common than previously reported

Autism without intellectual impairments more common than previously reported

More than half of autistic people in the United States have an average or above-average intelligence quotient (IQ), an uptick over previous estimates, a new longitudinal study of children in Minnesota suggests. The rise could reflect a heightened awareness and understanding of the condition, as well as improvements in recognizing and detecting it, says lead investigator Maja Katusic , a developmental pediatrician at the Mayo Clinic in Rochester, Minnesota. In 2016, the proportion of autistic children in the U.S. with an average or higher IQ was 42 percent , according to the most recent autism prevalence data published by the Centers for Disease and Control and Prevention (CDC) in 2020. The new study, however, suggests that this number could be as high as 59 percent. Katusic and her colleagues scoured a trove of medical and school records from more than 30,000 people born between 1976 and 2000 in Olmsted County, Minnesota. They identified people with autism based on behavioral assessments and descriptions in the records, using either an inclusive or narrow definition of the condition in the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV). The inclusive definition flagged children who met criteria for autistic […]

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