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What is autism?

There are three different types of ASDs:

  • Autistic Disorder (also called “classic” autism) This is what most people think of when hearing the word “autism.”  People with autistic disorder usually have significant language delays, social and communication challenges,and unusual behaviors and interests. Many people with autistic disorder also have intellectual disability.
  • Asperger Syndrome
    People with Asperger syndrome usually have some milder symptoms of autistic disorder.  They might have social challenges and unusual behaviors and interests.  However, they typically do not have problems with language or intellectual disability.
  • Pervasive Developmental Disorder – Not Otherwise Specified (PDD-NOS; also called “atypical autism”)
    People who meet some of the criteria for autistic disorder or Asperger syndrome, but not all, may be diagnosed with PDD-NOS. People with PDD-NOS usually have fewer and milder symptoms than those with autistic disorder.  The symptoms might cause only social and communication challenges.

How common is autism?

ASDs occur in all racial, ethnic, and socioeconomic groups, but are almost five times more common among boys than among girls. CDC estimates that about 1 in 88 children has been identified with an autism spectrum disorder (ASD).  More people than ever before are being diagnosed with an ASD. It is unclear exactly how much of this increase is due to a broader definition of ASDs and better efforts in diagnosis. However, a true increase in the number of people with an ASD cannot be ruled out. We believe the increase in ASD diagnosis is likely due to a combination of these factors.

Information from www.cdc.gov