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IJE Advance Access originally published online on September 7, 2009
International Journal of Epidemiology 2009 38(5):1241-1242; doi:10.1093/ije/dyp259
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Published by Oxford University Press on behalf of the International Epidemiological Association © The Author 2009; all rights reserved.

Commentary: On King and Bearman

Eric Fombonne

Canada Research Chair in Child Psychiatry, Department of Psychiatry, Montreal Children's Hospital, McGill University, 4018 Ste-Catherine West Montreal, QC H3Z 1P2, Canada.

E-mail: eric.fombonne@mcgill.ca

Accepted 23 September 2008

The first 10% of the full text of this article appears below.

Much has been speculated about the origin of increased numbers of children receiving a diagnosis of autism spectrum disorder (ASD) in the last 20 years. This phenomenon has been observed worldwide, in countries where repeated epidemiological surveys or surveillance systems could capture these trends upwards. Interestingly, this acceleration occurred at around the same time in the late 1980s or early 1990s. As these trends were recorded in countries as far apart as the USA, the UK, Denmark, Sweden and Japan, it made it less likely that increases were due to exposure to environmental risk factors that would operate simultaneously in such disparate and . . . [Full Text of this Article]


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