Social class and infantile autism.
Autism strikes all social classes equally, yet poverty can still shape how symptoms look.
01Research in Context
What this study did
Catania et al. (1982) looked at medical records from 1970s Göteborg, Sweden.
They compared the social class of kids with autism to a random sample of kids from the city.
The goal was to test the old idea that autism mostly hits wealthy families.
What they found
Autism showed up in rich, middle, and poor families at the same rate.
The social-class spread matched the whole city almost exactly.
No high-class bias was found.
How this fits with other research
Pham et al. (2022) tracked a birth cohort and saw the opposite: lower income, lone-parent homes, and prenatal stress predicted more autism traits at age 2.
The clash is real, but the 2022 study measured early traits, not final diagnosis, and used modern tools.
Mammarella et al. (2022) adds a twist: birth-order language gaps in autistic kids are biggest in low-income homes, showing money still shapes development even if it does not cause autism.
Why it matters
You can reassure families that autism risk is not tied to bank balance.
When you see more red flags in low-income homes, think broader stress and exposure, not class itself.
Keep screening every child the same, but add extra support when poverty piles on.
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02At a glance
03Original abstract
Twenty infantile autistic children, constituting what is likely to be the majority of the total population of autistic children born in the years 1962 through 1973 and living in Göteborg, Sweden, by the end of 1978, were compared with a random population sample of 59 7-year-old Göteborg children with regard to social class. Two different social classification systems were used, one that takes account only of the father's occupation and one that includes several other parameters. The distributions of social class were almost identical in the infantile autism group and in the random group. With respect to some other social circumstances the two groups were very similar. Thus, the present results lend no support for the view that autistic children tend to come from high social classes.
Journal of autism and developmental disorders, 1982 · doi:10.1007/BF01531368