Gastrointestinal symptoms and sensory abnormalities associated with behavioral problems in children with neurodevelopmental disorders.
Stomach pain and sensory issues each make behavior worse in ASD and ADHD—screen for both when meltdowns rise.
01Research in Context
What this study did
Shunya and colleagues asked parents of 6- to young learners with ASD or ADHD to fill out three short checklists. One list tracked tummy pain, constipation, diarrhea, and other GI issues. Another listed sensory seeking, avoiding, and sensitivity. The third rated irritability, hyperactivity, and repetitive behaviors.
The team then used statistics to see if GI or sensory scores predicted behavior problems when both were in the same model.
What they found
Kids with more GI symptoms had worse behavior scores, even after accounting for sensory issues. Likewise, kids with more sensory problems had worse behavior scores, even after accounting for GI issues. The two risks added up rather than cancelling out.
In plain words, a child with both stomach pain and loud-noise sensitivity scored higher on irritability and hyperactivity than a child with only one of those issues.
How this fits with other research
Slaughter et al. (2014) already showed that GI pain goes hand-in-hand with irritability and stereotypy in ASD. Kurokawa et al. (2021) extend that link by adding ADHD and showing the effect is separate from sensory issues.
Barnhill et al. (2020) reported that one boy’s behavior improved after a special diet eased his GI pain. The new study supports that story with group data, not just a single case.
Anthony et al. (2020) found sleep-breathing problems worsened behavior in Down syndrome. Shunya swaps the body system—GI instead of sleep—but shows the same pattern: fix the body, help the behavior.
Why it matters
You can’t treat what you don’t detect. Because many kids with ASD or ADHD can’t say “My stomach hurts,” you need to ask parents or use a quick checklist. When behavior spikes, rule out constipation, reflux, or food sensitivities at the same time you rule out sensory overload. Addressing both fronts—GI and sensory—may give you additive gains without extra behavior plans.
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02At a glance
03Original abstract
Behavioral problems directly affect the quality of life of caregivers and children with autism spectrum disorder (ASD) and/or attention-deficit/hyperactivity disorder (ADHD), and is known to be associated with clinical factors such as gastrointestinal (GI) symptoms, sensory abnormalities, intellectual abilities, and use of medication. However, previous studies have not considered these relationships comprehensively. We conducted a cross-sectional study of 6-12-year-old children with diagnoses of ASD and/or ADHD at two hospitals in Japan. Scores for the aberrant behavior checklist (ABC), autism-spectrum quotient (AQ), and Conners 3, as well as information on daily sleep and exercise, GI symptoms, and Short Sensory Profile, were collected. Each factor was subjected to a correlation analysis to investigate its effect on ABC scores. A stepwise multiple linear regression analysis for the factors with p < 0.05 was performed. Data were obtained from 60 patients with a mean age of 8.3 years; 21 had ASD alone, 18 had ADHD alone, and 21 had ASD + ADHD. The correlation analyses identified six factors associated with ABC severity: (a) methylphenidate use, (b) Conners hyperactivity score, (c) Conners inattention score, (d) AQ score, (e) SSP score, and (f) GI symptom score. The multiple regression showed that "GI symptoms" and "sensory abnormalities" were independently associated with ABC severity. Although further studies are needed to show a causal relationship, appropriate assessment of GI symptoms and sensory abnormalities may help alleviate some problematic behaviors and improve the quality of life of children with neurodevelopmental disorders and their families. LAY SUMMARY: Behavioral problems in children with neurodevelopmental disorders are known to be associated with many factors. This study aimed to comprehensively investigate the known factors. We have discovered that "gastrointestinal symptoms" and "sensory abnormalities" were independently associated with Behavioral problems. Our results suggest that it is important for clinicians and caregivers to pay more attention to children's GI symptoms and sensory abnormalities that may not present as obvious symptoms or complaints.
Autism research : official journal of the International Society for Autism Research, 2021 · doi:10.1002/aur.2549