回答: 世界自闭症日，关心下中国的自闭症儿童 由 挺好 于 2016-04-02 9:12

http://www.hcs.harvard.edu/hghr/online/autism-on-the-rise-a-global-perspective/

The estimates of children with autism spectrum disorder (ASD) in the U.S. have continued to rise significantly, according to the Center for Disease Control. As of March 2013, the CDC estimates that one in every 50 school children are diagnosed with ASD—a 1.16% increase from the estimates revealed in 2012 1 . Other post-industrial counties are experiencing a similar trend of rising ASD incidence rates—the UK reported in 2012 an increase of 56% of children with autism in the last five years 2 . While ASD is increasing globally overall, however, many developing countries are reporting significantly lower rates. In China, for example, it is estimated that 1.1 in every 1,000 children are diagnosed with autism 3 . Similarly low rates among other developing countries are causing many to question what exactly is responsible for the difference in rates of ASD among developed and developing countries.