Associations Between Autistic Adolescents' Biological and Behavioral Characteristics and Sympathetic and Parasympathetic Functioning.
Abbie Heidenreich, Whitney Sullivan, Chrystyna D Kouros and 2 others
PMID 41653338WHAT IT FOUND
In 110 autistic adolescents, higher BMI was linked to lower resting heart-rate variability, and higher autism symptoms and adaptive skills were linked to lower sweat-gland responses during a stress task; many other links were not found.
Key findings
01After controlling for other variables, higher BMI was associated with lower baseline RSA.
02After controlling for other variables, older age was associated with higher baseline PEP.
03After controlling for other variables, greater autism-related behaviors and greater adaptive functioning were each associated with lower SCL reactivity, and all other regression associations were non-significant.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
Only verbally fluent adolescents with IQ scores of at least 70 were included, so the findings do not cover autistic adolescents with intellectual disability or limited speech. The sample was mostly male (80.7%), so sex-related findings may be unstable. PEP analyses had missing data: 22 adolescents were missing baseline data and 32 were missing reactivity data. SCL analyses removed two adolescents due to signal disruptions. 27.3% were taking one prescription medication, and a further 27.3% were taking more than one, so specific medication effects could not be tested. All reactivity was measured during one task, watching a recorded parental conflict, so results may not apply to other stressors. Pubertal status, height, and weight were based largely on parent report. The study reports associations, not treatment effects.
Declared interests
The authors declared no conflict of interest. Parents received $75 and adolescents received $10 in gift cards after each study visit.
The easy way to misread this
Do not read the BMI, age, or autism-symptom associations as evidence that a treatment changes autonomic functioning. This was a correlational study of baseline and reactivity measurements, so it does not show cause or treatment effects.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →