The published paper finds evidence from the literature of in large increase in prevalence and suggests that it should be a matter of urgent public concern.
California Autism Prevalence Trends from 1931 to 2014 and Comparison to National ASD Data from IDEA and ADDM
The prevalence of autism in the CDDS dataset, the longest of the three data records, increased from 0.001% in the cohort born in 1931 to 1.2% among 5 year-olds born in 2012. This increase began around ~ 1940 at a rate that has gradually accelerated over time, including notable change points around birth years 1980, 1990 and, most recently, 2007.
Using literature AD data from long-term (approximately 10-year) studies, we determined cumulative incidence of AD for each cohort within each study.
This review summarizes results that correlate the timing of changes in incidence with environmental changes. Autism could result from more than one cause, with different manifestations in different individuals that share common symptoms.