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As diagnosis is increasingly being given to people with higher functioning autism, there is a tendency for the proportion with comorbid intellectual disability to decrease over time. In a 2019 study, it was estimated that approximately 30–40% of people diagnosed with ASD also have intellectual disability. [257]
The number of diagnosed cases of autism grew dramatically in the U.S. in the 1990s and have continued in the 2000s. For the 2006 surveillance year, identified ASD cases were an estimated 9.0 per 1000 children aged 8 years (95% confidence interval [CI] = 8.6–9.3). [30]
Many anxiety disorders, such as social anxiety disorder and generalized anxiety disorder, are not commonly diagnosed in people with ASD because such symptoms are better explained by ASD itself, and it is often difficult to tell whether symptoms such as compulsive checking are part of ASD or a co-occurring anxiety problem. The prevalence of ...
Furthermore, the presence of autism can make it harder to diagnose coexisting psychiatric disorders such as depression. [9] Diagnosing will be much harder in adults, since most people with ASD who reach adulthood undiagnosed, learn diverse (and often intense) masking techniques which make external diagnosis almost impossible.
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 ...
Story at a glance People on the autism spectrum may also have varying co-occurring disorders and psychiatric conditions. An analysis of more than 4,600 autistic adults finds differences in the ...
Luke Gawthorn is one of the approximately three million people in the UK with autism, ADHD or dyslexia who say they have been discriminated against by a hiring manager because of their condition
Across Europe, according to estimates by the Autism Europe collective of associations, between 76% and 90% of people with autism spectrum disorders were unemployed in 2014. [83] There are no official general (international) statistics on employment rates for adults with autism, only statistics by subgroup. [ 24 ]