Changes to our genes or the environment don't seem to explain the recent rise in autism diagnoses. Here's what does.
a professor of psychiatry and pediatrics and co-director of the Intellectual and Developmental Disabilities Research Center at the Washington University School of Medicine in Saint Louis.
“We’re diagnosing autism 10 to 50 times more now than we were 25 years ago. The advance in paternal age is only responsible for around 1 percent of that whole effect,” Constantino says. The influence of parental age on developmental disabilities should be taken seriously, given that a small change is still meaningful in the context of the global population, he notes. It just doesn’t account for the trend overall.
If genetic and environmental factors have remained steady over time, cultural and diagnostic shifts must be responsible for the spike in prevalence, Taylor says. Both families and clinicians today are likely more aware of autism and its symptoms than in past decades, making diagnosis more likely. Changes in diagnostic criteria also play a role. Clinicians diagnose mental health conditions based on criteria delineated in the
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