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Sep 25, 2012 7:38 PM by Alyse Rzemek

Knee replacements soar among US older folks

CHICAGO (AP) - Just like baby boomers, older folks have seen a surge in knee replacements.

The findings are from a study of more than 3 million Medicare patients who got artificial knees over two decades. The number of initial knee-replacements done each year more than doubled during that time.

There were nearly 244,000 in 2010. The study authors say the increase is partly driven by a desire to stay active and by obesity, which takes a toll on joints. The aging population and rising numbers of Medicare enrollees also contributed.

The pace of growth slowed in more recent years - possibly because increasing numbers of younger adults have also been getting artificial knees.

The study appears in Wednesday's Journal of the American Medical Association.

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