From:  Autism First Steps, November 22, 2001

Dr. Eric Fombonne says, "prevalence of autism is 68 per 10,000 or 1-147. "

At the recent IMFAR (International Meeting For Autism Research) Conference, noted autism epidemiologist Dr. Eric Fombonne stated in his presentation that based on 50 previously published epi studies of autism, the prevalence rate of autism had been established, by his work and others, at between 2 to 10 per 10,000...which is to say as low as 1-5000 or as high as 1-1000 (Fombonne's own past studies reported the lower end of the prevalence spectrum). In a monumental statement at IMFAR, Fombonne now claims, as a result of his most recent work, that the prevalence of autism is 68 per 10,000 or 1-147.
  
   Fombonne's latest work shows that the prevalence of autism has increased between 600% and 3400% (1-1000 down to 1-147 = 600% increase) and (1-5000 down to 1-147 = 3400% increase). Using the middle ground of 5 per 10,000 or otherwise stated as 1-2000, the most recent epi study by this most conservative autism epidemiologist would now suggest a 1300% increase in the prevalence of autism over a 25 year period, or on average, a doubling of the prevalence of autism every two years between 1976 and 2001
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