The New England journal of medicine
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There are large variations in the use of knee arthroplasty among Medicare enrollees according to race or ethnic group and sex. Are racial and ethnic disparities more pronounced in some regions than in others, and if so, why? ⋯ In the Medicare population, the rate of surgical treatment for osteoarthritis of the knee varies dramatically according to sex, race or ethnic group, and region. These variations underscore the importance of geography and sex in determining racial or ethnic barriers to health care.