Feb 06 2012
Last week, I discussed a rather execrable study. Actually, the study itself wasn’t so execrable, at least not in its design, which was a fairly straightforward three-arm randomized clinical trial. Rather it was the interpretation of the study’s results that was execrable. In brief, the authors tested an “energy healing” modality known as “energy chelation” versus a placebo (sham “energy chelation”) and found, as is so often the case in studies of “complementary and alternative medicine” (CAM) or “integrative medicine” (IM) that both modalities did better than no treatment on the primary outcomes but that the “real” treatment (if one can call energy chelation “real treatment”) produced outcomes that were statistically indistinguishable from the “sham” treatment. Not surprisingly, the next move on the part of the researchers was to do a bunch of comparisons, and, as is so often the case (particularly when one fails to correct statistically for multiple comparisons), they found a couple of secondary endpoints with barely statistically significant differences and trumpeted them as meaning that their “energy chelation therapy” has “significant promise for reducing fatigue.” They then argued that the study was also ” designed to examine nonspecific and placebo elements that may drive responses.”
Which brings us to the “power” of placebo.
As I was contemplating what I wanted to discuss this week, I thought about the study that Drs. Coyne, Johansen, and I objected to, but then I also thought about Dr. Crislip’s post last week and post I did about a month ago in which I noticed how lately CAM apologists seem to be—shall we say?—retooling their message in the wake of negative trial after negative trial of their implausible treatments. Gone (mostly) are claims of powerful specific effects and efficacy from treatments such as various “energy healing” modalities, acupuncture, homeopathy, and the like themselves, to be replaced by claims that physicians should embrace CAM because it’s “harnessing the power of placebo” to produce “powerful mind-body healing.” It’s a powerful message that has sucked in people who normally would be considered skeptics, such as Michael Specter, who, as I described, apparently bought into the message sufficiently that when Ted Kaptchuk was making the media round right before the holidays he happily published a fairly credulous interview with him entitled, The Power of Nothing: Could Studying the Placebo Effect Change the Way We Think About Medicine? (My answer: Very likely no.) Even Ira Flatow of Science Friday fell hard for Kaptchuk’s message, declaring at the beginning of the interview that Kaptchuk’s irritable bowel syndrome study is evidence that “placebos work even when patients are in on the secret.” (It’s not.)
That skeptics and scientists find the idea that the mind has the power to heal the body, often referred to as “self-healing” or “mind-body healing,” so seductive should probably not be surprising. After all, who wouldn’t want to be able to cure themselves simply by willing it to be so? It’s a concept that, like so many concepts in CAM, goes far back into ancient times and stretches forward to today in ideas like The Secret, which goes quite a bit beyond the whole idea of “mind-body healing” or healing yourself because you wish it to be so, and declares that you can have virtually anything you want simply by thinking the right thoughts. In fact, to me it appears that the “powerful placebo” is being drafted in the service of supporting what are, at their core, mystical beliefs far more than science. I’d like to elaborate on that idea a bit more than I did last time I discussed this isssue, where I concluded by writing:
In the end, all too much of the rebranding of CAM as placebo and the selling of placebos as some sort of powerful “mind-body healing” strikes me as being much like The Secret, in which wishing makes it so.
Let’s take a look at just how far this goes.
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