Circannual pattern of autistic births: Reanalysis in three ethnic groups

Human Biology | August 1, 1996| | Copyright

Abstract Seasonal variations in births of autistic subjects have been reported for the United States, Canada, Sweden, Japan, and Israel. Here, data from England, Japan, and Israel are reanalyzed using spectral analysis for the cosine function. A sample of 583 autistic births occurring over 40 years (1947-1989) is meta-analyzed, focusing on rhythmicity. Major periodicities of 17.6, 18.6, and 21.8 years, on which minor periodicities ranging from 2.2 to 4.1 years were superimposed, yielded the best-fitting cosine function to significantly explain variance of autistic birth patterns. It is ...

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