Anjali Jain of the Lewin group presented on data they have collected from medical records about the prevalence of co-occurring conditions found in autistic children in the U.S.. This presentation was made to the Interagency Autism Coordinating Committee in Sept. 2014. (the original video is here, and the Lewin Group talk started at about timestamp 17:50. The original has closed captioning).
Some of the most common co-occurring conditions are anxiety and depression. In fact, mental health conditions are found in about 70% of autistics. Similarly, neurological conditions and neurodevelopmental disorders are found in about 70% of autistics. By comparison, GI+nutritional disorders (which include areas like allergies), which get a great deal of attention, are found in about 20% of the autistic population. While large, this is much less common than the 70% rates found for mental health and neurodevelopmental disorders.
Another interesting finding was that autistic children are seen more often for treatment of infectious diseases. If the risk for serious problems from infectious diseases is higher in autistic children, this makes the decision of many autism parents to stop vaccinating their children even more problematic.
The full video (with closed captioning) can be found here:
http://videocast.nih.gov/launch.asp?18636
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By Matt Carey
Left Brain Right Brain 
For these posts, would you mind also linking back to the original IACC page and giving the approximate timestamp of the video? That would help those of us who need the closed captioning from the original videos.
Good points. Thanks!
I will add–I apologize that I can’t work out how to download with the closed captioning. They make a file available but I haven’t been able to work out a quick way to include that in these videos. I’ll try to get that in the future, but I can’t guarantee it.