Risk of another autism spectrum disorder child after a first one is much lower than presumed

Autistic spectrum disorders represent a variety of types of the neurodevelopmental disease that is diagnosed in around one in 20 children, more commonly in boys than in girls.

By
August 27, 2015 11:37
2 minute read.
An autistic child plays with a horse during the Horse Therapy Special Children program

An autistic child plays with a horse during the Horse Therapy Special Children program at the Mounted Police Sub-Division in Bangkok. (photo credit: REUTERS)

 
X

Dear Reader,
As you can imagine, more people are reading The Jerusalem Post than ever before. Nevertheless, traditional business models are no longer sustainable and high-quality publications, like ours, are being forced to look for new ways to keep going. Unlike many other news organizations, we have not put up a paywall. We want to keep our journalism open and accessible and be able to keep providing you with news and analyses from the frontlines of Israel, the Middle East and the Jewish World.

As one of our loyal readers, we ask you to be our partner.

For $5 a month you will receive access to the following:

  • A user uxperience almost completely free of ads
  • Access to our Premium Section and our monthly magazine to learn Hebrew, Ivrit
  • Content from the award-winning Jerusalem Repor
  • A brand new ePaper featuring the daily newspaper as it appears in print in Israel

Help us grow and continue telling Israel’s story to the world.

Thank you,

Ronit Hasin-Hochman, CEO, Jerusalem Post Group
Yaakov Katz, Editor-in-Chief

UPGRADE YOUR JPOST EXPERIENCE FOR 5$ PER MONTH Show me later Don't show it again

The risk of a family with one child on the autism spectrum of having another with the disorder is only around 5 percent – much lower than the estimated 20% that has been claimed in foreign studies, according to a Hebrew University of Jerusalem study.

The study, carried out in cooperation with the National Insurance Institute’s research and planning administration, is based those who receive allotments from the NII to help cover the costs of children with autism. It gives parents accurate assessments on the risks based on characteristics of the families.

Be the first to know - Join our Facebook page.


Autistic spectrum disorders represent a variety of the neurodevelopmental diseases that are diagnosed in around one in 20 children, more commonly in boys than in girls.

The NII said that parents with one autistic child struggle over whether to have more children – as shown on the Channel 2 TV series Yellow Peppers. A US study in 2011 claimed that there was a one-in-five risk of having a second symptomatic child because of genetic causes.

But the NII researchers say now that the US study was based on a “small and biased sample.”

A Danish and Swedish study from three years ago said that there was a one-in-14 risk of having another autistic child.

Prof. Michael Beenstock of the Hebrew University’s economics department and Dr. Ra’anan Raz and Dr. Haggai Levine of the Hebrew University-Hadassah School of Health and Community Medicine investigated the risk factors for repeated autism in families.



Using the extensive NII database to research how many families actually applied for disability support for autistic children, they found that between 1986 and 2012, there were 9,117 Israeli families with one autistic child, 362 with two and just three families with three.

For 1,033 families, there was one autistic child who had no subsequent siblings. For 3,185 families with one autistic child, they had only normal children before the disabled child was born and they had no more children after the disabled child’s birth. Thus a total of 4,898 families had 8,188 children whose younger siblings had autism. The risk of a subsequent autistic child was only 4.5%, according to the database.

As most diagnoses are made up to the age of four, waiting for the child to be older led to a repeat rate of 5.25% among families where the affected child was diagnosed at an older age.

The risk of a repeat autism child is 10 times that in families that already have a child with autism compared with families that have none. This points to the genetic basis for autism, the researchers said, but there may be environmental factors in which offspring were exposed to toxins or pathogens that contributed to the development of autism.

More studies of this type are needed based on population data, so that decisions can be made by the family and the population in general, the authors concluded.

Related Content

PROF. AVIRAM NISSAN performing lifesaving surgery at Sheba Medical Center.
July 18, 2018
Sheba Medical Center is a global leader in HIPEC surgery

Sponsored Content