Before age 55, men are more likely to get osteoarthritis than women. However, after age 55, the disease becomes more common in women. Overall, more women have osteoarthritis than men. One possible reason: Women’s broader hips may put more long-term stress on their knees. The knee joint is one of the most common places for osteoarthritis to occur.
Age (getting older), obesity and injury are the most common causes of OA.