The latest version of the US Government’s autism diagnostic test has found an unexpected number of autistic children who did not meet the criteria for autism.
A separate test found that nearly all of those who did meet the test had the condition in the past, but not the current one.
The latest version, the Autism Diagnostic Observation Schedule (ADOS), found that 1,722 children in the US were autistic in the 2016-17 school year.
This was a rise of 3.7 per cent on the previous year.
That means that, on average, 2,099 children in that age group were autistic.
But it was a slightly different story for autistic children in other countries, the new ADOS report found.
In Austria, for example, only 7 per cent of autistic students had the disorder in the previous school year, while almost half of the autistic population in the UK had autism.
The ADOS found that only 10 per cent in Sweden had autism in the year before.
What this means is that while the UK is seeing a rise in the number of children with autism, there is still a significant number of people in the country who have not met the criteria.
Prof Julie Sussman, from the University of Birmingham, said the data showed there were many other factors that contributed to the rise.
“These findings show there are many different types of autism, so it is important that we take a holistic approach to understanding the causes of autism,” she said.
“We need to understand how to identify the different forms of autism and the differences in how autism is diagnosed, and what interventions may be needed.”
The ADO was set up by the US government in 2009.
Its goal was to provide the “first comprehensive global autism assessment”.
In the UK, there are about 10,000 people on the autism spectrum.
There are more than 15,000 autistic children currently living in the United States.
Some of the new data suggests that the rate of autistic people in general may be going up.
This is because autism is a condition that is associated with certain mental health problems and that people with autism have an increased risk of having other mental health issues, such as depression and anxiety.
It also means that there are more people who have the condition now than in the 1970s and 1980s.
‘Terrifying times’ The ADOs data, which is published in the Journal of Autism and Developmental Disorders, also suggests that some autistic children have had a lot of changes over the past five years.
In 2016-2017, just 1,816 children were autistic, but in 2017-2018 that number was up to 3,071.
That was a decrease of more than 50 per cent.
There are also more children now with autism who have autism than there were in 2015-2016.
Professor Susser said that, although she believed the numbers were a good start, more work was needed.
We need more data to better understand how autism develops, she said, adding that she was concerned about the impact that increased rates of autism may have on the autistic community.
“I am also concerned about how autism may affect other people and the families who might have them,” she added.
“It is also concerning that it is not being seen as a public health issue, but as a mental health issue.”
These are frightening times, but we need to take the best of the evidence and build on it to understand autism more fully and more quickly.
“What is autism?
Autism is a disorder where people have problems with communication, repetitive behaviours and social interaction.
It is defined as a learning disability.
It affects about 0.7 to 1 per cent the population.
Source: NHS Choices What is autism anyway?
Autistic children are people who do not meet one of the following criteria:have an autism spectrum disorder,have a general disability,have social difficulties and/or a limited social interaction,are diagnosed with Asperger’s syndrome,have been diagnosed with a developmental delay or Aspergillus or have an impairment that can be explained by one or more of these disorders.
The condition is often diagnosed as a developmental disorder but not all autism spectrum disorders are autism spectrum, and the diagnosis does not necessarily indicate autism.
In the US, autism is not officially recognised by the government and there are some parents who think it is, but it is recognised as a spectrum disorder.
It includes many of the characteristics of autism: the inability to communicate, socialise, form attachments or make decisions.
Autism can also cause a range of impairments, including difficulty in socialising, learning or concentrating.
It also affects how people feel and function.
The ADOS test is a tool used by government departments to assess autism.
The test is used by the National Institute of Mental Health (NIMH), which has been working to develop a better test to be used more widely