Hypochondriac Nation

Have you ever felt like everything causes cancer? Personally, the endless articles on the health dangers of cell phones, chocolate, free-range salmon and farmed salmon have made me more reckless. If the Diet Coke doesn't kill me, driving with flip-flops will.

Ronald Bailey reviews what looks like an interesting book by Geoffrey C. Kabat, Hyping Health Risks. In "Scared Senseless" (WSJ), he recount's Kabat's claim that epidemiologists should not always be trusted. Here's the introduction:

Does the wearing of shoes with heels cause schizophrenia? That was the contention made in 2004 by a Swedish physician in Medical Hypotheses, a scientific journal that specializes in out-of-the-box thinking. "Heeled footwear," the physician observed, "began to be used more than 1,000 years ago, and led to the occurrence of the first cases of schizophrenia." As heeled shoes sprinted across the world, he said, so did the incidence of the disease. He called for epidemiological studies to check his hypothesis.

It is possible that some epidemiologist somewhere is crunching heeled-shoe data and preparing a paper on the subject. And if such a paper appears, the media will treat it with sober regard -- assuming that it confirms the doctor's wild idea. A Nexis survey of newspaper headlines from the past week finds epidemiological studies playing a role in all sorts of claims: that sleep apnea increases the risk of early death; that thunderstorms provoke asthma attacks; that cellphones might cause cancer; that flu shots may not help the elderly; that consuming fruit drinks increases the risk of diabetes in women. Some of these reports may turn out to be important but most will amount to a kind of scientific noise, adding to our uneasy sense that, in the modern world, danger lurks on every side.

In "Hyping Health Risks," Geoffrey Kabat, an epidemiologist himself, shows how activists, regulators and scientists distort or magnify minuscule environmental risks. He duly notes the accomplishments of epidemiology, such as uncovering the risks of tobacco smoking and the dangers of exposure to vinyl chloride and asbestos. And he acknowledges that industry has attempted to manipulate science. But he is concerned about a less reported problem: "The highly charged climate surrounding environmental health risks can create powerful pressure for scientists to conform and to fall into line with a particular position."

Chalk another one to the postmodernists. There's no such thing as naked facts. If you have a chance to read Kabat's book, let me know what you think.