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The epidemiology of autism is the study of the incidence and distribution of autism spectrum disorders (ASD). A 2022 systematic review of global prevalence of autism spectrum disorders found a median prevalence of 1% in children in studies published from 2012 to 2021, with a trend of increasing prevalence over time.
Autism spectrum disorder [a] (ASD), or simply autism, is a neurodevelopmental disorder "characterized by persistent deficits in social communication and social interaction across multiple contexts" and "restricted, repetitive patterns of behavior, interests, or activities". [11]
The estimated prevalence of autism is 11.8 per 10,000 people while the estimated prevalence of autism spectrum conditions is 26.6 per 10,000 people. In Japan, recent estimates of autism spectrum are as high as 13 per 10,000 people. This suggests that autism is more common in Asia than previously thought.
Autism spectrum disorder spiked 175% among people in the U.S. from 2.3 per 1,000 in 2011 to 6.3 per 1,000 in 2022, researchers found. ... Experts not involved in the study said the research ...
In 2020, prevalence for autism spectrum disorder was 30% higher for Black, Asian and Hispanic 8-year-olds than in 2018. For white 8-year-olds, ASD prevalence was 14.6% higher than it was in 2018.
Nationally, the rise in autism rates has been similar to the trend in New York and New Jersey, according to a 2021 CDC report. One in 54 children had been diagnosed with autism by age 8 in 2016 ...
Autism concordance in siblings and fraternal twins is anywhere between 0 and 23.5%. This is more likely 2–4% for classic autism and 10–20% for a broader spectrum. Assuming a general-population prevalence of 0.1%, the risk of classic autism in siblings is 20- to 40-fold that of the general population.
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