Parent-Reported Developmental Regression in Autism: Epilepsy, IQ, Schizophrenia Spectrum Symptoms, and Special Education.
Ask parents about any history of lost skills—those reporting regression are more likely to have co-occurring epilepsy, ID, and restrictive school placements.
01Research in Context
What this study did
García-Villamisar et al. (2017) asked parents of children with autism if their child ever lost skills.
They then checked medical and school records for epilepsy, IQ scores, special-education type, and any schizophrenia-like symptoms.
The team wanted to see if kids with parent-reported regression looked different from kids without such history.
What they found
Children whose parents recalled regression were more likely to have intellectual disability, epilepsy, restrictive classrooms, and odd thoughts or behaviors.
No numbers were given, but the pattern was clear: reported skill loss came with heavier loads later on.
How this fits with other research
Giannotti et al. (2008) saw the same epilepsy link, adding that regressed kids also sleep worse.
Tan et al. (2021) and Prigge et al. (2013) pooled many studies and still found about one in three children with autism lose skills, so the 2017 single set sits inside that big tent.
Boterberg et al. (2019) built on the 2017 work by showing these kids also had poorer early communication—an extension, not a clash.
Why it matters
When intake forms show a history of lost words or play, you now have extra reasons to screen for seizures, low IQ, and restrictive placements.
Share this heads-up with parents and the medical team so everyone plans sturdier supports from day one.
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02At a glance
03Original abstract
Examined the psychiatric and clinical correlates of loss of previously acquired skills (regression) as reported by parents of youth with autism spectrum disorder (ASD). Study sample comprised 6- to 18-year old (N = 213) children and adolescents with ASD. Parents reported regression in 77 (36%) youth. A more homogeneous subgroup with regression between 18 and 36 months (n = 48) had higher rates of intellectual disability, epilepsy, and special education, more socially restrictive educational settings, and more severe ASD communication deficits and schizophrenia spectrum symptoms than non-regressed youth (n = 136). Similar results were obtained for a more inclusive definition of regression (n = 77). A brief parent report of developmental regression may be a useful clinical indicator of later general functioning.
Journal of autism and developmental disorders, 2017 · doi:10.1007/s10803-016-3004-1