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Ellsworth C. Alvord, Jr, MD
Department of Pathology Neuropathology Laboratory (RJ-05) University of Washington School of Medicine Seattle, WA 98195

Arch Neurol. 1986;43(10):979.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor.

—With the increasing effort to apply the scientific method in Medicine, it was surprising to see a classic example of comparisons of apples and oranges in the recent articles on the Guillain-Barré syndrome (GBS) by Beghi et al¹ and Kurland et al.²

The unnumbered figure on page 1056¹ in Beghi and coworker's article shows what happens when the nationwide attributed risk for GBS following swine influenza vaccination as reported by Schonberger et al³ is compared with (1) the nationwide weekly incidence rate also reported by Schonberger et al,³ (2) the Michigan rate reported by Breman and Hayner,⁴ and (3) the Olmsted County, Minnesota, rate reported by Beghi et al.¹

Since one of the basic tenets of statistics maintains that the information concerning the "experimental" and "control" populations should be gathered simultaneously, preferably by blind observers unbiased toward the outcome, it . . . [Full Text PDF of this Article]

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