In many autism prevalence studies, higher socio-economic status (SES) for the parents is correlated with higher autism rates in the children of those families. While a conclusive reason for this has not been shown, it has been conjectured that the SES variability could be due to social influences such as access to care. A recent study from Sweden shows the opposite. In this study, lower income families and children of parents with manual occupations show higher autism prevalence:
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