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De Omnibus Dubitandum - Lux Veritas

Thursday, April 4, 2013

The Cancer Clusters That Weren’t

A recent post in ACSH Dispatch examines an interesting question: How likely is it that some U.S. communities have elevated cancer rates, a.k.a, “cancer clusters,” because of chemical pollution? The answer: not very.
ACSH points to an enlightening article published in Slate by George Johnson, who notes:
Time after time, the clusters have turned out to be statistical illusions—artifacts of chance. … The Erin Brockovich incident, one of the most famous, is among the many that have been debunked. Hexavalent chromium in the water supply of a small California town was blamed for causing cancer, resulting in a $333 million legal settlement and a movie starring Julia Roberts. But an epidemiological study ultimately showed that the cancer rate was no greater than that of the general population. The rate was actually slightly less.
Johnson also discusses the alleged cancer cluster in Toms River, N.J., which is the subject of a new book: Toms River: A Story of Science and Salvation, by Dan Fagin. But contrary to Fagin’s book, Johnson concludes: “… no matter how hard I squinted at the numbers, I found it hard to be convinced that there had been a cancer problem in Toms River.”…To Read More…..

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