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Eating Issues Common in People With Autism, and Girls Are More Susceptible

HealthDay News
by By Cara Murez HealthDay Reporter
Updated: May 4th 2021

new article illustration

TUESDAY, May 4, 2021 (HealthDay News) -- While it's well established that autism and certain eating issues go hand in hand, does gender also play a role?

Apparently it does, according to Swedish researchers who set out to better understand whether being male or female influenced eating issues in people who have autism.

The study found that autistic traits predicted eating problems, but the link was more pronounced particularly among girls or women. These issues around eating might increase the risk of social isolation for females with autism, the researchers also found.

"We didn't study the potential genetic difference between males and females, but we did look at this association between autism and eating problems. And we wanted to know if that was different between females and males," said study author Karl Lundin Remnelius, a PhD student at Karolinska Institutet in Stockholm.

The specific eating problems that were noted by females involved social settings, Remnelius said.

"These items were, for example, 'I find it difficult to eat with friends' or 'I find it difficult to eat in school or in a workplace or in a restaurant,'" Remnelius said. "And we actually saw when we looked closer at this subscale that it was only these social items that autistic females report or had higher scores in."

The study also found that autistic traits predicted increased eating problems. This may not be that autism also causes eating problems but that certain genetic factors could be responsible for both, Remnelius said.

"We don't know if this is causal, is autism causing eating problems, or if there might be some other factor that might be influencing both autism and eating problems. One thing could be that some of the genes that increase the likelihood of a person having autism might also increase the likelihood of a person having eating problems," Remnelius said.

"Sometimes you describe that as genetic confounding, so it's not really autism causing eating problems," he said. "It's more that people who have autism also have a sort of higher likelihood of having eating problems."

The study included nearly 200 identical and fraternal twins between the ages of 15 and 33, including 28 individuals diagnosed with autism, who were all part of the Roots of Autism and ADHD Twin Study in Sweden. The study looked at associations across the whole sample and then within the twin pairs.

Participants reported their eating issues in a questionnaire that covered eating problems in a broad way, Remnelius said. Participants also had neurodevelopmental assessments, and researchers collected parent-reported autistic traits information.

Eating problems included selective eating, sensory sensitivity concerning food and symptoms of eating disorders.

These social eating problems might limit females from having opportunities for social interaction, Remnelius suggested, saying there should be more research on the issue.

The findings were presented Monday at the International Society for Autism Research virtual annual meeting. Such research is considered preliminary until published in a peer-reviewed journal.

The study confirms results seen before, said Pamela Feliciano, scientific director of SPARK (Simons Powering Autism Research), who was not involved with this study.

Past research has shown a link between autism or having autistic traits and having eating selectivity. Cognitive inflexibility can be a risk factor for disordered eating, she said.

The idea that there is a gender difference in eating issues is interesting and a new aspect that needs to be understood more, Feliciano said.

"I do think that becomes important," she said. "If a kid with autism will only eat three things, it will be really hard for that kid to integrate into social situations."

It can also be hard for families to have experiences when eating is so limited, Feliciano said. Therapy can help change this by slowly building a person's eating repertoire.

Many parents of children who have autism report selective eating, she noted. Some children will eat only fewer than five foods or only food of a certain color.

"It's complicated. I think the repetitive behavior, the tendency for repetitive behavior and wanting to do the same thing over and over again plays into it, but there's also -- and research has shown this -- is a sensory component of it," Feliciano explained. "So, if kids have a sensory sensitivity to loud noises and can't stand it, eating a crunchy food is going to be painful to them."

More information

The Autism Society is a research organization that offers information on autism.

SOURCES: Karl Lundin Remnelius, PhD student, Karolinska Institutet and Center for Neurodevelopmental Disorders at Karolinska Institutet, Stockholm, Sweden; Pamela Feliciano, PhD, Simons Powering Autism Research (SPARK), New York City, International Society for Autism Research virtual annual meeting, May 3, 2021