Osteoarthritis is one of the most frequent causes of physical disability among adults.
Some younger people get osteoarthritis from a joint injury.
But osteoarthritis most often occurs in older people.
By age 65, more than half of the population has x-ray evidence of osteoarthritis in at least one joint.
Both men and women have the disease.
Before age 45, more men have it, while after age 45 osteoarthritis is more common in women.
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Arthritis
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