Osteoarthritis is by far the most common type of arthritis, and the percentage of people who have it grows higher with age. An estimated 12.1 percent of the U.S. population (nearly 21 million Americans) age 25 and older have osteoarthritis.
Although osteoarthritis is more common in older people, younger people can develop it – usually as the result of a joint injury, a joint malformation, or a genetic defect in joint cartilage. Both men and women have the disease. Before age 45, more men than women have osteoarthritis; after age 45, it is more common in women. It is also more likely to occur in people who are overweight and in those with jobs that stress particular joints.
As the population ages, the number of people with osteoarthritis will only grow. By 2030, 20 percent of Americans – about 72 million people – will have passed their 65th birthday and will be at high risk for the disease.
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