Friday, May 17, 2013
Evidenced Based Practice: When will Law Catch up with Medicine?
Two widely reported studies this week about bed rest for women at risk of preterm delivery and reduction of salt consumption in order to promote heart health highlight two things we don’t think about enough—that a lot of standard medical practices are without any foundation in science and a lot of legal ones probably are too. However, medicine has more and more taken the public health approach of examining the practices of individual doctors to see how effective they actually are in the general population. For example, it is old news that prescribing bed rest to pregnant women at risk of preterm delivery is not effective. But what this Obstetrics & Gynecology study found that “activity restriction”, such as quitting work, is still prescribed to one at three women at risk for preterm delivery. The accompanying “Bed Rest in Pregnancy: Time to Put the Issue to Rest” makes an ethical argument that continuing to prescribe bed rest in the absence of evidence of its effectiveness violates the principles of autonomy and beneficence.
The Institute of Medicine just issued this report Sodium Intake in Populations: Assessment of Evidence “found no consistent evidence to support an association between sodium intake and either a beneficial or adverse effect on most direct health outcomes other than some CVD outcomes (including stroke and CVD mortality) and all-cause mortality.”
We have similar research in law- a lot of it coming from the Empirical Legal Studies movement, including work done at the Center for Empirical Legal Research at Washington University Berkeley Emperical Legal Research , the Centre for Emprical Legal Studies at UCL (formerly known as University College London) among many others, but it is not as well funded or coming from as well established sources as the studies which attempt to find an evidence basis for medical practices. The salt reduction report was commissioned by the Institute of Medicine In contrast, the ACLU supports its empirical argument that the death penalty does not deter crime on an opinion survey of police chiefs. Translating information from research scientists to practicing physicians is still a slow process,—but no one questions the underlying principle that medical practice should be based on scientific evidence.
Part of the issue is funding. Medicine as a whole is in a constant quest to contain costs and stopping ineffective practices is an important component of that effort. But beyond a small number of progressive funders like the Robert Wood Johnson Foundation, there isn’t a lot of demonstrable interest, the kind supported by funding studies, in law making bodies in finding out what legal practices work and what do not.
This isn’t a new observation. Bryant Garth outlined the problem in 1997 when he explained the importance of more social science research into the foundational principles of practices civil procedure. But the steady flow of studies questioning conventional wisdom coming from the medical field has, as yet, no real counterpart in the world of law making.
Of course there will always be the problem of knowing the unknowable. But it would be interesting for law makers to consider taking a lesson from public health in challenging assumptions about the human body and mind or even more generally the physical world that underlie both common law and statutes.