[Autism](http://www.answers.com/topic/autism “Answers.com”) disorders are more common than previously known, affecting an average of 1 in 150 children, says a new federal report called the most complete assessment on the topic to date.

Earlier estimates placed the rate at 1 in 166 children.

[Read](http://www.usatoday.com/news/health/2007-02-08-autism_x.htm?csp=34 “Read the Story”)(USA Today)