Children with autism spectrum disorder who improve with fever: Insights from the Simons Simplex Collection.
Level 4 - case-series / case-control
Cross-sectional comparison of parent-reported subgroups within a registry cohort
PubMed 28861935 · doi:10.1002/aur.1856
What was done
Researchers analyzed parent reports from 2,152 children with autism spectrum disorder (ASD) enrolled in the Simons Simplex Collection to determine whether children exhibited behavioral improvements during fever. The dataset was split into discovery and replication samples to compare children reported to improve during fever (Improve Group) with those who did not (No Improve Group) across demographic characteristics, medical history, ASD symptoms, adaptive functioning, and de novo ASD-associated mutations.
What was found
Parents of 17% of children reported improvements during fever across domains including cognition, communication, repetitive behaviors, and social interaction. In both discovery and replication samples, children in the Improve Group had significantly lower non-verbal cognitive ability (NVIQ), lower language levels, and more repetitive behaviors. The groups did not differ significantly on demographic variables, parent-reported current ASD symptoms, or the presence of de novo mutations. Specific effect sizes, test statistics, and p-values were not reported in the abstract.
Why it matters
These findings suggest that parent-reported fever-associated behavioral improvements occur in a specific subgroup of children with ASD characterized by greater cognitive and language impairment and more prominent repetitive behaviors.
Limits
The identification of fever-related improvement was based entirely on retrospective parent recall rather than prospective, standardized clinical assessment during active febrile episodes. The abstract does not report exact numerical effect sizes or confidence intervals, and biological mechanisms underlying the reported phenomenon were not directly evaluated.
Cited by
- context Hot baths improve autistic symptoms in children.