Autism is often undiagnosed until age 5 or older, study shows

From WebMD (5/24):

U.S. researchers looked at school-aged children with special health care needs and autism spectrum disorder and found that more than half of them were diagnosed with autism at age 5 or older. They also reported that more than 50% of the children received at least one psychiatric drug. The study was published in the NCHS Data Brief.

http://www.webmd.com/brain/autism/news/20120523/most-children-with-autism-diagnosed-at-5-or-older