Older Men More Likely To Father A Child With Autistic Spectrum Disorder - Royal College Of Psychiatrists

Main Category: Autism
Also Included In: Fertility;  Men's health;  Seniors / Aging
Article Date: 01 Oct 2008 - 2:00 PDT

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Children born to older fathers are at increased risk of having an autistic spectrum disorder (ASD), according to new research published in the October issue of the British Journal of Psychiatry.

But the researchers found no link between increased maternal age and the risk of ASD.

The study, which was carried out in Japan, involved 84 participants with 'high-functioning' ASD. This meant that they displayed symptoms of autism, such as difficulties with socialising, communication and behaviour, but did not have an intellectual disability (i.e. all the participants had an IQ of more than 70).

This group was compared with 208 healthy controls, who had no intellectual disability and had not been diagnosed with any psychiatric disorder.

The participants were divided into three groups, depending on how old their parents were when they were born. The three age classes were: under 29, 29-32 and over 33.

The researchers found that a one-level advance in the paternal age class corresponded to a 1.8-fold increase in the risk of the child having high-functioning ASD. However, there was no association between an increase in the maternal age at birth and the development of ASD.

Explanations for the effect are unclear, but it is thought that mutations can occur in the paternal germ line as the father gets older. Mutations in sperm can then be passed on to children.

This is the first study to explore the effect of paternal age on the risk of high-functioning ASD. Its findings correspond with previous studies which have shown a link between older fathers and a low IQ in children.

Reference:

Tsuchiya K, Matsumoto K, Miyachi T, Tsujii M, Nakamura K, Takagai S, Kawai M, Yagi A, Iwaki K, Suda S, Sugihara G, Iwata Y, Matsuzaki H, Sekine Y, Suzuki K, Sugiyama T, Mori N and Takei N (2008) Paternal age at birth and high-functioning autistic-spectrum disorder in offspring, British Journal of Psychiatry, 193: 316-321

The Royal College of Psychiatrists is the professional and educational body for psychiatrists in the United Kingdom and the Republic of Ireland. We promote mental health by:

- Setting standards and promoting excellence in mental health care
- Improving understanding through research and education
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The Royal College of Psychiatrists has been in existence in some form since 1841. First as the "Association of Medical Officers of Asylums and Hospitals for the Insane" (later changed to the Medico Psychological Association) then, in 1926 receiving its Royal Charter to become the "Royal Medico Psychological Association, and finally, in 1971 receiving a Supplemental Charter to become the "Royal College of Psychiatrists" we know today.

Royal College of Psychiatrists