Effect of comorbid allergic diseases on attention-deficit hyperactivity disorder symptoms and sleep: A cross-sectional study.
Food allergy in kids with ADHD predicts slightly worse hyperactivity/impulsivity and sleep-disordered breathing, so consider allergy referral when these symptoms spike.
01Research in Context
What this study did
Panpan et al. (2025) asked a simple question: do allergies make ADHD worse? They looked at kids who already had an ADHD diagnosis. Then they noted which kids also had asthma, eczema, or food allergy.
The team used surveys and clinic charts. They compared hyperactivity, impulsivity, and sleep problems across groups. The design was cross-sectional: one point in time, no treatment given.
What they found
Food allergy stood out. Kids with ADHD plus food allergy scored a bit higher on parent-rated hyperactivity/impulsivity. They also showed more signs of sleep-disordered breathing.
Having more than one allergy did not add extra risk. It was the type, not the count, that mattered. Asthma and eczema alone did not show the same pattern.
How this fits with other research
Reus et al. (2013) saw the same inflation effect: when ADHD rides along with another condition, parent reports spike. In their study, ASD scores looked worse if ADHD was also present. Zhang finds the same logic in the medical world: food allergy makes ADHD symptoms look worse on paper.
Sasson et al. (2022) surveyed kids with Down syndrome and found allergy disorders clustered with ADHD presentations. Zhang narrows the field, showing food allergy is the key driver, not just any allergic condition.
Whaling et al. (2025) reported that poor sleep raises the odds of ADHD symptoms in autistic girls. Zhang flips the lens: in straight-ADHD kids, food allergy predicts sleep-disordered breathing, which may then feed the hyperactivity parents see.
Why it matters
When a child's hyperactivity suddenly escalates, check for new food reactions. A quick referral to allergy clinic can rule out triggers and may improve sleep. Better sleep often means smoother behavior sessions and less need for medication tweaks. Document the allergy status in your intake forms and share the finding with the pediatrician.
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02At a glance
03Original abstract
INTRODUCTION: Recent studies have shown a close relationship between attention-deficit hyperactivity disorder (ADHD) and allergic diseases in children. Regrettably, few studies have investigated the effect of comorbid allergies on ADHD symptoms and sleep, in particular, it is unclear whether comorbid allergic conditions further exacerbate sleep problems in children with ADHD. OBJECTIVE: To investigate the effect of comorbid allergic on symptoms and sleep in children with ADHD. METHODS: This was a cross-sectional study, 222 ADHD children (aged 6-14 years) were enrolled in, of whom 93 had allergic diseases and 129 without allergic diseases. Collected all ADHD symptom severity and functional impairment scales, including: Swanson, Nolan and Pelham (SNAP) scale, Integrated Visual and Auditory Continuous Performance Test (IVA-CPT), Conners Parents Symptom questionnaire (PSQ) and Weiss Functional Impairment Rating Scale-Parent Form (WFIRS-P). Every guardian of children diagnosed with ADHD is required to complete the Children's Sleep Habits Questionnaire (CSHQ). RESULTS: Compared to ADHD children without allergic diseases, we observed significantly higher hyperactivity and impulsivity scores on the SNAP-IV, higher hyperactivity index and impulsivity index on the PSQ, and higher risky activities on the WFIRS-P in ADHD children with comorbid allergic diseases (all p < 0.05). CSHQ total score and sleep disordered breathing were particularly prominent in ADHD children with comorbid allergic diseases (all p < 0.05), and changes in CSHQ correlate with ADHD symptoms and functional impairment. Further analyses revealed that ADHD symptoms and sleep did not worsen with increasing number of comorbid allergic diseases (all p > 0.05). The primary influence on ADHD symptoms and sleep was the type of allergic diseases, where food allergies predominantly influence ADHD symptoms, including attention deficit disorder and hyperactivity disorder (all p < 0.05); allergic rhinitis notably impacts parasomnias, sleep disordered breathing (all p < 0.05); and allergic asthma significantly affects sleep anxiety, daytime sleepiness, and sleep disordered breathing in children with ADHD (all p < 0.05). CONCLUSION: The presence of comorbid allergic diseases affects both the hyperactivity and impulsivity symptoms of ADHD and sleep disordered breathing, predominantly influenced by the type of the allergic diseases.
Research in developmental disabilities, 2025 · doi:10.1016/j.ridd.2024.104907