Opinion: Don't homogenize healthcare

In American medicine today, "variation" has become a dirty word. Variation in the treatment of a medical condition is associated with wastefulness, lack of evidence and even capricious care. To minimize variation, insurers and medical specialty societies have banded together to produce a dizzying array of treatment guidelines for everything from asthma to diabetes, from urinary incontinence to gout. At some level, this makes sense. Some types of variation are unwarranted, even deadly. For example, we know that ACE inhibitor drugs improve quality of life and survival in heart-failure patients, but only two-thirds of American physicians prescribe these drugs to such patients.