Incidence of Physical Health Conditions in Autistic Children Within 5 Years After Their Autism Diagnosis.
Within a year of autism diagnosis, preschoolers have sharply increased odds of serious physical illnesses—factor this into your medical referrals and family psychoeducation.
01Research in Context
What this study did
Chuang et al. (2025) tracked new physical-health diagnoses in preschoolers with autism.
They used insurance records to count how many kids got heart, hormone, or brain-vessel disorders in the five years after the autism label.
The study looked at the very first year after diagnosis and then yearly up to year five.
What they found
Heart, hormone, and stroke-related illnesses showed up two to seventy times more often in these young autistic children.
The spike was biggest in the first year and stayed high through all five years.
Even toddlers were landing in clinics for problems usually seen in much older adults.
How this fits with other research
Matson et al. (2011) already warned that autism rarely travels alone; the new numbers prove how big the gap is.
Harstad et al. (2026) saw rising developmental conditions like ADHD after diagnosis, while Yu-Chieh et al. show medical illnesses also climb—different domains, same trend.
McDonald (2012) found one in five cognitively able kids lost the autism label by age eight, yet Yu-Chieh et al. still show high illness in the whole group; the contradiction fades when you see the 2012 sample was higher-functioning and smaller.
Reyes et al. (2019) link autism plus intellectual disability to later preventable hospital stays; Yu-Chieh et al. reveal the fresh diagnoses that likely feed those admissions.
Why it matters
When you give families the autism news, also hand them a medical roadmap. Schedule cardiology, endocrine, and routine lab checks that same month. Flag any fatigue, rapid weight gain, or fainting to the pediatrician fast. Early referral can catch diabetes or heart issues before they become emergencies you might otherwise miss.
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02At a glance
03Original abstract
This study aimed to investigate the incidence of physical illnesses of autistic young children compared with children in the general population. This population-based study included children (aged ≤ 5 years) with newly diagnosed autism (autism group), followed up for 5 years after their autism diagnoses. Data were collected from Taiwan's National Health Insurance Research Database in the period of 2000-2019. Autistic children (n = 45,680) were matched (1:20; by age and sex [assigned at birth]) with a comparison group from the general population (n = 913,600). We calculated incidence rate ratios (IRRs) for physical illnesses diagnosed within 5 years after autism diagnoses. Data were analyzed using Poisson regression models adjusted for person-time and stratified by sex and the presence/absence of intellectual disabilities. The prevalence of almost all illnesses across major organ systems after 1 year of autism diagnosis was higher in the autism group than in the comparison group. The autism group exhibited significantly elevated incidence of cardiovascular disorders, cerebrovascular disorders, and endocrine diseases within 1 year after autism diagnosis (IRR 2.30-71.42). Although the incidence rates of these illnesses decreased over the 5-year follow-up period in the autism group, they remained higher than those in the comparison group, with most IRRs exceeding 2 in the fifth year after autism diagnosis. The IRRs were significant in both autistic male and female children and those with and without intellectual disabilities, although those with intellectual disabilities displayed descriptively larger IRRs. Autistic young children have heightened risks of being diagnosed with physical illnesses soon after their autism diagnoses. Future research should understand the etiological associations between autism and physical illnesses to offer tailored care from early in life.
Autism research : official journal of the International Society for Autism Research, 2025 · doi:10.1002/aur.70109