A study in Korea in the South of the CHICAGO - suggests approximately 1 38 children have features of autism, higher than a previous estimate of U.S. 1 to 100.
By casting wider net and looking closely at ordinary children, researchers should find a higher rate of characteristics of autism. But they were surprised at the rate was. They do not think that the Korea of the South has more children with autism than the United States, but rather that autism is often not diagnosed in many countries. American estimates are based on education and medical records, not the longest investigation in South Korea.
Two-thirds children with features of autism in the study were in ordinary school population, had not been diagnosed before and did not get special services. Many of these likely undiagnosed children have mild social unrest, rather than the more severe autism.
"This means not all of a sudden, there are more new children with (autism spectrum disorders)," said co-author Dr. Shin Young Kim of the Yale Child Study Center. "They have been there all along but were not counted in previous prevalence studies."
It is not clear if the children need special or services, said other experts.
"I am sure that some of these children could probably benefit from the intervention, but I do not think that we could make a statement all would benefit from intervention," said Dr. Marshalyn Yeargin-Allsopp, head of the Centers for Disease Control and Prevention of developmental disabilities branch.
The CDC has not been involved in the new study, while another federal agency, the National Institute of Mental Health, has provided funding. The group, talks about autism, advocates for more aggressive autism screening, also contributed to pay for the study. Autism General had no role in the design of the study.
The research, published Monday in the American Journal of Psychiatry, attempted to screen all 55,000 schoolchildren, aged 7 to 12, in a town in the district of Goyang, near Seoul.
However, only about two-thirds of the ordinary children participated. Approximately 63% of parents filled out a questionnaire. Researchers have recognized that the parents of affected children may be more likely to complete the questionnaire.
The questionnaire used is a screening tool recognized for the high-functioning Autism such as Asperger syndrome. He asks questions such as whether the child "also different Markdown" in a number of ways, including lack of empathy, a lack of best friends and was bullied by other children.
From there, some children which screened positive tested more far. Very few children actually completed the full diagnostic process. But researchers say that they were still able to use the results to estimate that approximately 2.6% of the population had some features of autism - from the estimate of the U.S. of 1 per cent.
The ambitious study took five years to complete. The Government of the United States approach is faster and more current results, Yeargin-Allsopp said.
"Community providers, researchers and others are interested in the prevalence of autism on a frequent basis," said Yeargin-Allsopp. "This is not possible if you make a projection of an entire population" as it has been attempted by the researchers of the Korea of the South.
Other funders of the study were Brain Research Foundation of the children and the Institute of the George Washington University for ethnographic research.
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