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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.
Men and boys are more frequently diagnosed with autism than women and girls. It is debated whether this is due to a sex difference in rates of autism spectrum disorders (ASD) or whether females are underdiagnosed. [1] [2] The prevalence ratio is often cited as about four males for every one female diagnosed. [3]
Autism cases spiked 175% among U.S. residents from 2011 to 2022. The rates climbed at a faster rate among young adults. Autism is spiking in young adults, study finds
According to the CDC, in 2023, 1 in 36 8-year olds were found to be diagnosed with ASD while in 2018, only 1 in 44 8-year olds were found to be diagnosed with ASD. [37] Studies also show that boys are more likely to be diagnosed with ASD than girls despite there being no difference between the two in symptoms and overall expression. [38]
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 ...
A 2003 review of epidemiological studies of children found autism rates ranging from 0.03 to 4.84 per 1,000, with the ratio of autism to Asperger syndrome ranging from 1.5:1 to 16:1; [142] combining the geometric mean ratio of 5:1 with a conservative prevalence estimate for autism of 1.3 per 1,000 suggests indirectly that the prevalence of AS ...