Evidence is the password to all that is scientific in medicine.
For better or worse -- and largely for better -- we have all come to rely on the evidence when we make medical choices, and presume that our physicians are relying on evidence when we are offered options.
Evidence that we are not fooling ourselves or being fooled has been a grail of philosophers for centuries.
But today the focus is on drugs, particularly new drugs.
Most of medicine escaped this new level of oversight and still does. In particular, procedures fall out of the purview of the FDA unless the procedure involves placing some substance or widget into the body, and then the test relates more to safety than evidence of efficacy.
Most surgery is not "evidence-based;" it remains eminence-based, dripping with hubris.
For necessary surgery, there may be no better way than to turn than to experienced surgeons who hold survival in their hands. To their credit, surgeons are willing to make head-to-head comparisons of different approaches.
Of course, it would be unconscionable not to do what is considered, at least by some, to be the best in any desperate situation. Spine surgeons can be heroes in this regard, when it comes to stabilizing fractured or tumor-riddled spines.
But most surgery today is "elective." It is not necessary, because it is not certain that you will be better off for it, or worse off without it.
Slowly but surely, elective surgery is being subjected to studies designed to generate evidence necessary to make an informed decision. But with very rare exception, all these studies are seriously flawed by avoiding the most stringent test of efficacy.
These studies compare one procedure with another, or one procedure with a nonsurgical therapy. But the only true test of elective surgery is to compare the surgery that is believed to work with a sham procedure.
You heard me right. When this has been done for angina and for knee pain, the sham procedure is at least as good as the one thought to have worked.
I have no problem with a study that informs the volunteers that they are likely to have a sham procedure. In fact, I'm troubled that such is not commonplace.
Nearly all surgery for regional back disorders is elective. I coined the term regional back disorders for an editorial in the New England Journal of Medicine 20 years ago. It denotes the back pain and other symptoms that afflict adults who are otherwise well, who have suffered no overt trauma, and who have no major neurological complication.
Depending on where you live in the country, you can run a 10-fold greater risk of being offered and accepting surgery for a regional back disorder than if you live in any other country. It's open season on the American spine.
Nearly all this surgery is for low back pain. Spine surgeons have long felt beleaguered by critics such as me. After all, there have been a number of studies, mainly from Europe, that fail to generate an iota of evidence for any benefit from any form of spine surgery for regional low back pain. For workers' compensation claimants, surgery is likely to leave you worse off.