The best indication that medicine is an art rather than a science is the vast variation in practice patterns. Research begun by Dr. John Wennberg at Dartmouth College in the 1980s and continued by the Rand Corp., among others, revealed significant differences in levels of care from one community to another and sometimes even within communities, within different clinical areas, for example hysterectomies or tonsillectomies.
The issue of medical practice variation might have remained a matter of professional debate about appropriate clinical practices were it...
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